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[ For Public Release ]
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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
SunOS, Solaris libXt Vulnerability
Update to libXt in Bulletin H-51
August 25, 1997 23:00 GMT Number H-100
______________________________________________________________________________
PROBLEM: A vulnerability exists for a buffer overflow condition in the
Xt library and the file xc/lib/Xt/Error.c.
PLATFORM: Solaris 2.5.1, 2.5, 2.4, and 2.3 (SunOS versions 5.5.1,
5.5.1_x86, 5.5, 5.5_x86, 5.4, 5.4_x86, 5.3, 4.1.4, and
4.1.3_U1.)
DAMAGE: Allows unauthorized file access possibly gaining root
privilege.
SOLUTION: Apply patches as listed in Section 4.
______________________________________________________________________________
VULNERABILITY Sun strongly recommends that you install the patches listed in
ASSESSMENT: section 4 immediately on systems running SunOS 5.5.1, 5.5, 5.4,
5.3, 4.1.4, and 4.1.3_U1. Exploit information is publicly
available.
______________________________________________________________________________
[ Start Sun Microsystems Advisory ]
______________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00153
Date: August 25, 1997
Cross-Ref: CERT CA-97.11
Title: Vulnerabilities in libXt
______________________________________________________________________________
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.
Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
______________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, 2.3,
(SunOS 5.5.1, 5.5, 5.4, 5.3), SunOS 4.1.4, and 4.1.3_U1, which relate
to vulnerabilities in libXt.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, 5.4, 5.3, 4.1.4, and
4.1.3_U1. Exploit information is publicly available.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, 5.4_x86, 5.3, 4.1.4, and 4.1.3_U1
The vulnerabilities are fixed in Solaris 2.6.
3. Understanding the Vulnerabilities
libXt is a library in the X Windows system. There are several buffers
in libXt that may be overflowed. The buffer overflow vulnerabilities may
be exploited through setuid and setgid programs that link libXt to
increase privileges, including root privileges.
4. List of Patches
The vulnerabilities in libXt are fixed by the following patches:
OS version Patch ID
__________ ________
SunOS 5.5.1 104338-02
SunOS 5.5.1_x86 105105-01
SunOS 5.5 104337-02
SunOS 5.5_x86 105104-01
SunOS 5.4 105075-01
SunOS 5.4_x86 105103-01
SunOS 5.3 101429-04
SunOS 4.1.4 100512-05
SunOS 4.1.3_U1 100512-05
5. Checksum Table
The checksum table below shows the BSD checksums (SunOS 4.1.x: /bin/sum;
SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 5.x: /usr/bin/sum), and
the MD5 digital signatures for the above-mentioned patches that are
available from:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
These checksums may not apply if you obtain patches from your answer
centers.
File Name BSD SVR4 MD5
_______________ _________ __________ ________________________________
104338-02.tar.Z 19861 746 5636 1492 5C41779D358B7C3E96A6AFBAD69E26BB
105105-01.tar.Z 60209 652 30450 1303 859659A92DE3CB4FC476F41E30442695
104337-02.tar.Z 07260 740 64023 1480 2F9E1064C17AD040EC45255DFF8DEFE5
105104-01.tar.Z 11186 802 44802 1603 580F3B9FF748E0913322CB431893815C
105075-01.tar.Z 51275 709 63521 1417 8B6A52B62D9092C7061A80AA33BDB4AA
105103-01.tar.Z 20278 619 48559 1238 E1A592FFACAFD2B3A79B2A7C525B24A2
101429-04.tar.Z 35975 991 3045 1981 1EA911E52281DD23856316F49825EABA
100512-05.tar.Z 58168 468 3889 936 9189EFFE254BF48BF68B7C381BB78615
______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
Customers with Sun support contracts can also obtain patches from local
Sun answer centers and SunSITEs worldwide.
B. Sun security bulletins are available via World Wide Web at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins>
C. Sun Security Coordination Team's PGP key is available via World Wide Web
at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins/SunSCkey.txt>
D. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
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______________________________________________________________________________
[ End Sun Microsystems Advisory ]
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________
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H-96: Vulnerability in Bind
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H-97: SGI IRIX ftpd Signal Handling Vulnerability
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H-99: SunOS, Solaris ifconfig ioctls Vulnerability
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