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          Automated Systems Security Incident Support Team
                                                _____
             ___   ___  _____   ___  _____     |     /
      /\    /   \ /   \   |    /   \   |       |    / Integritas
     /  \   \___  \___    |    \___    |       |   <      et
    /____\      \     \   |        \   |       |    \ Celeritas
   /      \ \___/ \___/ __|__  \___/   |       |_____\
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  
    
                       Bulletin  94-22
 
           Release date: 7 June 1994 7:00 AM EDT
 
SUBJECT: Vulnerability in HP/UX /etc/subnetconfig

SUMMARY: A vulnerability exists in certain versions of HP/UX 
subnetconfig that allow existing users on a system to increase
their privileges.  These versions of subnetconfig exist on HP-UX
versions 9.0 and 9.01.  They do not exist in prior versions of
HP-UX or in versions subsequent to the above (9.03, etc.).

BACKGROUND: The vulnerability is a result of an access permissions
problem, and can be eliminated by applying a patch developed by
HP.  This problem affects HP 9000 Series 300, 400, 700, and 800
running HP-UX 9.0/9.01. 

IMPACT: An existing user can gain root access to the system.

RECOMMENDED SOLUTION: Apply patch PHNE_3563 (series 300/400, 
HP-UX 9.0), or PHNE_3564 (series 700/800, HP-UX 9.0/9.01 ONLY).
The patch can be obtained through HP SupportLine Mail Service or
local HP Response Centers.
A. HP SupportLine Mail Service

   To obtain the patch, send the following in the TEXT PORTION
   OF THE MESSAGE to support@support.mayfield.hp.com
   (no Subject is required):

   send patch_name
 
   for example:

   send PHNE_35nn

   It will automatically be emailed back to you.  Note that
   users with an established SupportLine handle & password may also
   download the patch from HP SupportLine via ftp, kermit, or uucp.
   Detailed instructions for obtaining a SupportLine handle & password
   can be found in ASSIST 94-14.

B. HP Response Center Support

   If you need additional assistance and have a support
   contract, you can contact your local Response Center for
   further help.

To apply the patch to your system:
   a. Become superuser (or root).
   b. Put the patch into /tmp.
   c. At the shell prompt, type "sh /tmp/PHNE_35nn"
   d. At the shell prompt, for 9.x systems type
      "/etc/update -s /tmp/PHNE_35nn.updt \*"

       Note: "nn" refers to the last two digits of the appropriate
       patch from the list in step 1.

Examine /tmp/update.log for any relevant WARNINGs or ERRORs.
   This can be done as follows:

   a.  At the shell prompt, type
       "tail -60 /tmp/update.log | more"
   b.  Page through the next three screens via the space bar,
       looking for WARNING or ERROR messages.

Consequences of installing this patch

   As a result of applying this patch and closing the security
   hole, /etc/subnetconfig will no longer be executable by non-root
   users.  This is consistent with the intended use of this program;
   it is intended for system administrators.

ASSIST is an element of the Defense Information Systems Agency 
(DISA), Center for Information Systems Security (CISS), that 
provides service to the entire DoD community.  If you are a 
constituent of the DoD and have any questions about ASSIST or
computer security issues, contact ASSIST using one of the methods
listed below.  If your organization/institution is non-DoD,
contact your Forum of Incident Response and Security Teams
(FIRST) representative.  You can obtain a list of FIRST member
organizations and their constituencies by sending email to
docserver@first.org with an empty "subject" line and a message body
containing the line "send first-contacts".

ASSIST INFORMATION RESOURCES: If you would like to be included  in
the distribution list for these bulletins, send your Milnet
(Internet) e-mail address to assist-request@assist.ims.disa.mil.
Back issues of ASSIST bulletins, and other security related  
information, are available from the ASSIST BBS at 703-756-7993/
1154 DSN 289, and through anonymous FTP from assist.ims.disa.mil
(IP address 137.130.234.30).  Note: assist.ims.disa.mil will only
accept anonymous FTP connections from Milnet addresses that are
registered with the NIC or DNS.
 
ASSIST contact information: 
PHONE: 800-357-4231 (or 703-756-7974 DSN 289), duty hours are 06:00
to 22:30 EDT Monday through Friday.  During off duty hours, weekends
and holidays, ASSIST can be reached via pager at 800-SKY-PAGE
(800-759-7243) PIN 2133937.  Your page will be answered within 30
minutes, however if a quicker response is required, prefix your
phone number with "999".  
ELECTRONIC MAIL: Send to assist@assist.ims.disa.mil. 
ASSIST BBS: Leave a message for the "sysop".
  
Privacy Enhanced Mail (PEM): ASSIST uses PEM, a public key   
encryption tool, to digitally sign all bulletins that are   
distributed through e-mail.  The section of seemingly random   
characters between the "BEGIN PRIVACY-ENHANCED MESSAGE" and   
"BEGIN ASSIST BULLETIN" contains machine-readable digital   
signature information generated by PEM, not corrupted data.     PEM
software for UNIX systems is available from Trusted Information
Systems (TIS) at no cost, and can be obtained via anonymous FTP
from ftp.tis.com (IP 192.94.214.96).  Note:   The TIS software is
just one of several implementations of PEM currently available and
additional versions are likely to be offered from other
sources in the near future. 
  
Reference herein to any specific commercial products, process, or
service by trade name, trademark manufacturer, or otherwise, does
not constitute or imply its endorsement, recommendation, or
favoring by ASSIST.  The views and opinions of authors expressed
herein shall not be used for adverstising or product endorsement
purposes. 

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