Published:
25 August 1997
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-97.110 -- Sun Security Bulletin #00153 Vulnerabilities in libXt 26 August 1997 =========================================================================== Sun Microsystems, Inc. has released the following bulletin concerning a a number of buffer overrun vulnerabilities in libXt, a library for the X windows system. These buffer overrun may be exploited, via a number of setuid and setgid programs that use this library, to gain privileged access. This problem was previously discussed in the CERT/CC Advisory CA-97.11, re-released by AUSCERT as ESB-97.054, although patch information for Sun systems was not available at this time.. 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 Sun Microsystems is included in the Security Bulletin below. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/information/advisories.html If you believe that your system has been compromised, contact AUSCERT or your representative in FIRST (Forum of Incident Response and Security Teams). 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. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ________________________________________________________________________________ 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 E. 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To subscribe, supply the following in the subject line (not body): subscribe cws your-email-address Note that your-email-address should be substituted by your email address. unsubscribe Sender is removed from the CWS mailing list. ________________________________________________________________________________ - -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNAHV9LdzzzOFBFjJAQHJngP9E2SzgLzCkaCgvEjuABPRs8lHpVHdxAog I9yDFXP7QQ3KPoIr/UBczry51LPqSacJAewN0MhzGPM2/MtWr31ZvNgP3Hbm7tm1 PjOGq1lwHK3eFUE3EILoOog2Ew7NVBqP//D94sYWG5H67L3l66vUd99vkcV8tPdO hXS6y8FoLN4= =dqoV - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBNAKfaCh9+71yA2DNAQFi9AP/ZTOfLQ8iUJjW0PYloctp3TDoCWjaZitQ vnVg1sUOu8BYkZjC/kU6v7PZFM5RaDd0AS4I8GT3L3FmKj9RA89JD7Me1JMO8lwb fYMtD3saxL6RSgCAu3t3s5GMhPQdbOMqGPlVa+Fx+4RLe5OWAmM0b0L83BoWh158 kU5gh4A32Zo= =DdYQ -----END PGP SIGNATURE-----