-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SunOS, Solaris libX11 Buffer Overflow Vulnerability September 17, 1997 22:00 GMT Number H-108 ______________________________________________________________________________ PROBLEM: A vulnerability exists in libX11, a library in the X Windows system. 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: The buffer overflow vulnerabilities may be exploited through setuid and setgid programs that link libX11 to increase privileges, including root privileges. 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: #00154 Date: September 17, 1997 Cross-Ref: Title: libX11 ______________________________________________________________________________ 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 libX11. 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 libX11 is a library in the X Windows system. There are several buffers in libX11 that may be overflowed. The buffer overflow vulnerabilities may be exploited through setuid and setgid programs that link libX11 to increase privileges, including root privileges. 4. List of Patches The vulnerabilities in libX11 are fixed by the following patches: OS version Patch ID __________ ________ SunOS 5.5.1 103566-21 SunOS 5.5.1_x86 104241-03 SunOS 5.5 103210-21 SunOS 5.5_x86 104242-02 SunOS 5.4 102057-41 SunOS 5.4_x86 103185-02 SunOS 5.3 101362-51 SunOS 4.1.4 100899-03 SunOS 4.1.3_U1 100899-03 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 4.1.x: /usr/5bin/sum; 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 _______________ _________ __________ ________________________________ 103566-21.tar.Z 58014 3555 65069 7109 9957BF7423D147E9CFAF877DF637A603 104241-03.tar.Z 11512 1450 52051 2899 C33B8EFD96A7BD22E07582E3C575669D 103210-21.tar.Z 13372 3651 11073 7301 619130609DBE46F7FFECAE89631E3A52 104242-02.tar.Z 55147 1415 30132 2830 83988AADB844139C744D3B81D4B2774F 102057-41.tar.Z 55014 2668 32935 5335 FDE4A6372ACA7CFD62F22DE4F424DEB2 103185-02.tar.Z 59698 1010 62623 2019 23B70F3AEBD6F0462053042FFC29E806 101362-51.tar.Z 26563 6475 50012 12949 B1F06E68F57745CC27328CFB88273349 100899-03.tar.Z 58461 417 51033 833 08C7D7AFFDE39C809F540BD907AA660B ______________________________________________________________________________ Sun acknowledges with thanks Marko Laakso (University of Oulu, Finland) for his assistance in the preparation of this bulletin. ______________________________________________________________________________ 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. Sun security bulletins are available via World Wide Web at: C. Sun Security Coordination Team's PGP key is available via World Wide Web at: 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. ______________________________________________________________________________ [ 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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If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) H-98: SunOS automounter Vulnerability H-99: SunOS, Solaris ifconfig ioctls Vulnerability H-100: SunOS, Solaris libXt Vulnerability H-101: FreeBSD procfs Vulnerability H-102: SGI IRIX webdist.cgi, handler and wrap programs Vulnerabilities H-103: HP-UX X11/Motif Libraries Vulnerability H-104: HP-UX libXt Vulnerability H-105: HP-UX vuefile, vuepad, dtfile, & dtpad Vulnerabilities H-106: SGI IRIX LOCKOUT & login/scheme Vulnerabilities H-107: UNIX Buffer Overflow in rdist Vulnerability -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBNCFeCLnzJzdsy3QZAQG1dAP/UBSJWfYLY0oHcLqV2zvdReWrGyKZAsbG pLM+vwT+Kc05dA614NIo1Prh8uy7ovY0HSgPn3FSCGGgYseN7PHIW3RCAb6KVZ/q honaHqPLdhOSFDJojL/1sam6wGtR8UPD+u1NE1A/D/5pJaSnikDc8+WL7c1M/qLH nNO59pHpJko= =492d -----END PGP SIGNATURE-----