TUCoPS :: HP/UX :: ciach104.txt

HP-UX Libxt Vulnerability



                       The U.S. Department of Energy
                    Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
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                             INFORMATION BULLETIN

                           HP-UX libXt Vulnerability
                      (Update to libXt in Bulletin H-51)

September 9, 1997 22:00 GMT                                       Number H-104
PROBLEM:       A vulnerability exists for a buffer overflow condition in the
               Xt library and the file libXt/Error.c.
PLATFORM:      HP 9000 series 700/800 systems running version 9.X or 10.X
DAMAGE:        May allows unauthorized file access possibly gaining root
SOLUTION:      Apply the patches listed below and relink any suid/sgid
               programs that use libXt.a.
VULNERABILITY  The information in the following Security Bulletin should be
ASSESSMENT:    acted upon as soon as possible. Hewlett Packard will not be
               liable for any consequences to any customer resulting from
               customer's failure to fully implement instructions in this
               Security Bulletin as soon as possible.

[ Start Hewlett-Packard Advisory ]

Document ID:  HPSBUX9704-058
Date Loaded:  970909
      Title:  Security Vulnerability in libXt for HP-UX 9.X & 10.X

- ------------------------------------------------------------------------
Last Revised: 08 September 1997
- -------------------------------------------------------------------------

The information in the following Security Bulletin should be acted upon
as soon as possible.  Hewlett Packard will not be liable for any
consequences to any customer resulting from customer's failure to fully
implement instructions in this Security Bulletin as soon as possible.

- -------------------------------------------------------------------------
PROBLEM:   Buffer overflow condition in libXt/Error.c

PLATFORM:  HP 9000 series 700/800 systems running version 9.X or 10.X

DAMAGE:    Users could increase privileges.

SOLUTION:  Apply the patches listed below and relink any suid/sgid
           programs that use libXt.a.  Programs that use the shared
           library libXt.sl require no action other than loading
           the patches.

AVAILABILITY: All patches are available now.

CHANGE SUMMARY:  Added patches for HP-UX 10.24.
- -------------------------------------------------------------------------
   A. Background
      A buffer overflow condition has been identified in the Xt
      library.  This can be exploited using suid/sgid programs
      to increase privileges.

   B. Fixing the problem
      Apply the library patches and relink any suid/sgid programs
      that are linked with the archived version of libXt.

   C. Recommended solution
        **REVISED 02**
        Install the applicable patches:

       PHSS_10167       9.X   X11R5/Motif1.2  Runtime
       PHSS_10168       9.X   X11R5/Motif1.2  Development

       PHSS_9809        10.0X  X11R5/Motif1.2  Runtime (also for 10.10)
       PHSS_9810        10.0X  X11R5/Motif1.2  Development

       PHSS_9809        10.10  X11R5/Motif1.2  Runtime (also for 10.0X)
       PHSS_9811        10.10  X11R5/Motif1.2  Development

       PHSS_10688       10.20 X11R5/Motif1.2  Runtime
       PHSS_9813        10.20 X11R5/Motif1.2  Development

       PHSS_10789       10.20 X11R6/Motif1.2  Runtime
       PHSS_9815        10.20 X11R6/Motif1.2  Development

   -->>PHSS_11021       10.24 VVOS X/Motif Runtime July97 Periodic patch

       Then relink as indicated above.

   D. Impact of the patch

      Installs new versions of X11R5 or X11R6 and Motif1.2.

   E. To subscribe to automatically receive future NEW HP Security
      Bulletins from the HP Electronic Support Center via electronic
      mail, do the following:

      User your browser to get to the HP Electronic Support Center
      page at:

        (for US, Canada, Asia-Pacific, & Latin-America)

        (for Europe)

      Click on the Technical Knowledge Database, register as a user
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      Near the bottom is a hyperlink to our Security Bulletin archive.
      Once in the archive there is another link to our current
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      by platform/OS release, and by bulletin topic.

   F. To report new security vulnerabilities, send email to


       Please encrypt any exploit information using the security-alert
       PGP key, available from your local key server, or by sending a
       message with a -subject- (not body) of 'get key' (no quotes) to

      Permission is granted for copying and circulating this Bulletin to
      Hewlett-Packard (HP) customers (or the Internet community) for the
      purpose of alerting them to problems, if and only if, the Bulletin
      is not edited or changed in any way, is attributed to HP, and
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      Any other use of this information is prohibited. HP is not liable
      for any misuse of this information by any third party.
- -----End of Document ID:  HPSBUX9704-058--------------------------------------

[ End Hewlett-Packard Advisory ]

CIAC wishes to acknowledge the contributions of Hewlett-Packard for the
information contained in this bulletin.

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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)

H-95: Vulnerability in x-lock
H-96: Vulnerability in Bind
H-92a: HP-UX X11/Motif Lib and Novell Netware Vulnerabilities
H-97: SGI IRIX ftpd Signal Handling Vulnerability
H-98: SunOS automounter Vulnerability
H-99: SunOS, Solaris ifconfig ioctls Vulnerability
H-100: SunOS, Solaris libXt Vulnerability
H-101: FreeBSD procfs Vulnerability
H-102: SGI IRIX webdist.cgi, handler and wrap programs Vulnerabilities
H-103: HP-UX X11/Motif Libraries Vulnerability

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