Published:
14 May 1997
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-97.063 -- REVISED 01 Hewlett-Packard Security Bulletin
Security Vulnerability in libXt for HP-UX 9.X & 10.X
15 May 1997
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Hewlett-Packard has released the following revised advisory concerning a
buffer overflow in the Xt library of the X Window System made freely
available by The Open Group. Platforms that have X applications built with
the setuid or setgid bits set may be vulnerable to buffer overflow
conditions. This vulnerability may allow local users to execute arbitrary
instructions as a privileged user without authorization.
The information in this bulletin supersedes the patch information
for Hewlett-Packard provided in Appendix A of CERT/CC advisory
CA-97.11 - Vulnerability in libXt, released as AUSCERT ESB-97-054.
The following security bulletin is provided as a service to AUSCERT's
members. As AUSCERT did not write this document, AUSCERT has had no
control over its content. As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.
Contact information for Hewlett-Packard is included in the Security Bulletin
below. If you have any questions or need further information, please
contact them directly.
If you believe that your system has been compromised, contact AUSCERT or your
representative in FIRST (Forum of Incident Response and Security Teams).
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/information/advisories.html
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 4477
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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**REVISED 01**HEWLETT-PACKARD SECURITY BULLETIN: #00058, 28 April 1997
Last Revised: 13 May 1997
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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.
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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: Correct patches for HP-UX 10.10 now included.
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I.
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**
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
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:
http://us-support.external.hp.com
(for US, Canada, Asia-Pacific, & Latin-America)
http://europe-support.external.hp.com
(for Europe)
Click on the Technical Knowledge Database, register as a user
(remember to save the User ID assigned to you, and your password),
and it will connect to a HP Search Technical Knowledge DB page.
Near the bottom is a hyperlink to our Security Bulletin archive.
Once in the archive there is another link to our current
security patch matrix. Updated daily, this matrix is categorized
by platform/OS release, and by bulletin topic.
F. To report new security vulnerabilities, send email to
security-alert@hp.com
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
security-alert@hp.com.
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
provided such reproduction and/or distribution is performed for
non-commercial purposes.
Any other use of this information is prohibited. HP is not liable
for any misuse of this information by any third party.
________________________________________________________________________
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