-----BEGIN PGP SIGNED MESSAGE----- [ For Public Release ] __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ 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: 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: Customers with Sun support contracts can also obtain patches from local Sun answer centers and SunSITEs worldwide. B. 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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. ______________________________________________________________________________ [ End Sun Microsystems Advisory ] CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. 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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) H-91: HP-UX Large UID's and GID's Vulnerability H-92: HP-UX X11/Motif Lib & Novell Netware Vulerabilities H-93: SGI IRIX ordist Buffer Overrun Vulnerability H-94: Vulnerability in ps 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 -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBNANNVrnzJzdsy3QZAQEgTAP+NDV5/cLMqBl0+972dMNxzLGEpmp6na7t uUttA5EdH7sw/gsye8J2At/X6SwIbxtRNyxgkb8z3D9G+U5B8UIkpNpw9dwuTzut 8jgEWfBV4q0dFTHjFXf2ePaafAVm9j33RdiiN+qXfjgbJJhK5dl1IzQzbqL+jaIS Bo83ARxLf40= =MuDh -----END PGP SIGNATURE-----