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__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
SunOS LC_MESSAGES Environment Variable Vulnerability
September 24, 1999 23:00 GMT Number J-069
______________________________________________________________________________
PROBLEM: A buffer overflow vulnerability has been identified in the
LC_MESSAGES Environment variable.
PLATFORM: SunOS 5.7, 5.7_x86, 5.6, 5.6_x86.
DAMAGE: A buffer overflow may be exploited to gain root access.
SOLUTION: Apply the available patches.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. Buffer overflow attacks are common and easy
ASSESSMENT: to execute. We are currently seeing numerous attacks on the
rpc.*** binaries (rpc.cmsd, rpc.ttdb) which depend on this
variable.
______________________________________________________________________________
[ Start Sun Microsystems Advisory ]
______________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00189
Date: September 8, 1999
Cross-Ref:
Title: LC_MESSAGES
______________________________________________________________________________
The information contained in this Security Bulletin is provided "AS IS." Sun
makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW. IN NO
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OF SUCH DAMAGES. If any of the above provisions are held to be in violation of
applicable law, void, or unenforceable in any jurisdiction, then such
provisions are waived to the extent necessary for this disclaimer to be
otherwise enforceable in such jurisdiction.
______________________________________________________________________________
1. Bulletin Topics
Sun announces the release of patches for Solaris(tm) 7 and 2.6 (SunOS(tm)
5.7 and 5.6) which relate to a buffer overflow vulnerability involving the
LC_MESSAGES environment variable.
Sun recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.7 and 5.6.
2. Who is Affected
Vulnerable: SunOS 5.7, 5.7_x86, 5.6, 5.6_x86.
Not vulnerable: All other supported versions of SunOS.
3. Understanding the Vulnerability
In libc, the LC_MESSAGES environment variable affects the behavior of
messaging functions. A vulnerability exists where a buffer overflow could
be exploited to gain root access. The patches listed in this bulletin
address both libc and the ufsrestore and rcp binaries which are statically
linked against libc.
4. List of Patches
The following patches are available in relation to the above problem.
SunOS version Patch ID
_____________ _________
5.7 106541-07
5.7 ufsrestore 106793-03
5.7 rcp 107972-01
5.7_x86 106542-07
5.7_x86 ufsrestore 106794-03
5.7_x86 rcp 107973-01
5.6 105210-24
5.6 ufsrestore 105722-03
5.6 rcp 107991-01
5.6_x86 105211-22
5.6_x86 ufsrestore 105723-03
5.6_x86 rcp 107992-01
___________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers at:
http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-
license&nav=pub-patches
B. Checksums for the patches listed in this bulletin are available at:
ftp://sunsolve.sun.com/pub/patches/CHECKSUMS
C. Sun security bulletins are available at:
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___________________________________________________________________________
Copyright 1999 Sun Microsystems, Inc. All rights reserved. Sun, Sun
Microsystems, Solaris and SunOS are trademarks or registered trademarks of
Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
Security Bulletin is not modified in any way and is attributed to Sun
Microsystems, Inc. and provided that such reproduction and distribution is
performed for non-commercial purposes.
[ End Sun Microsystems Advisory ]
______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems for the
information contained in this bulletin.
______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
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