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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0666 -- [SCO][Solaris] Buffer Overflow Vulnerability in libX11 15 September 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libX11 Solaris 10 Operating System Solaris 9 Operating System Solaris 8 Operating System Publisher: Sun Microsystems Operating System: Solaris SCO Impact: Root Compromise Execute Arbitrary Code/Commands Access: Existing Account Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102570-1 Comment: This advisory references vulnerabilities in products which run on platforms other than Solaris. It is recommended that administrators runing software which utilises libX11 check for an updated version of the software for their operating system. This vulnerability was discovered by RISE Security who have published the following advisory which includes proof of concept exploit code: http://www.risesecurity.org/advisory/RISE-2006001.txt According to the advisory published by RISE, this vulnerability was corrected in X11R6.5.1 - --------------------------BEGIN INCLUDED TEXT-------------------- Sun(sm) Alert Notification * Sun Alert ID: 102570 * Synopsis: Buffer Overflow Vulnerability in libX11 * Category: Security * Product: Solaris 9 Operating System, Solaris 10 Operating System, Solaris 8 Operating System * BugIDs: 6450316 * Avoidance: Patch, Workaround * State: Resolved * Date Released: 07-Sep-2006 * Date Closed: 07-Sep-2006 * Date Modified: 1. Impact A buffer overflow vulnerability in libX11 may allow local unprivileged users to be able to execute arbitrary code or commands with elevated privileges. The code or commands executed would run with the privileges of the application dynamically linked to the libX11 library. A number of programs shipped in Solaris and by third parties dynamically link with the libX11 library and run with elevated privileges. Sun acknowledges with thanks, RISE Security, for bringing this issue to our attention. This issue is also referenced in: http://www.risesecurity.org/advisory/RISE-2006001.txt 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 8 without patch 119067-03 * Solaris 9 without patch 112785-56 * Solaris 10 without patch 119059-16 x86 Platform * Solaris 8 without patch 119068-03 * Solaris 9 without patch 112786-45 * Solaris 10 without patch 119060-15 3. Symptoms There are no predictable symptoms that would indicate the described vulnerability has been exploited to execute arbitrary code on a system. 4. Relief/Workaround To work around the described issue, remove setuid(2) and setgid(2) privileges from all programs that link with libX11.so.4. Note: This may break the ability of these programs to perform their functions. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 8 with patch 119067-03 or later * Solaris 9 with patch 112785-56 or later * Solaris 10 with patch 119059-16 or later x86 Platform * Solaris 8 with patch 119068-03 or later * Solaris 9 with patch 112786-45 or later * Solaris 10 with patch 119060-15 or later This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 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 member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRQoy3yh9+71yA2DNAQLjVgP/dmIN7pGqD1qbv8/hp3pKvDN5MCPjlzMH 9/uqsmVwn2X9ZJOhVB2ax/YJxYtpYASP7vERf+4kIMqKBkaT4en9p87zbez0hw5P qpSpZI3wAt61WKQy8Iqkj4Dgews4Wxl3JfTwhoH9nXvVDOZ6RSUi5V+eySnorhPR /URnjxW//dM= =i2k7 -----END PGP SIGNATURE-----