From agent99@sgi.com Wed Dec 4 18:41:27 2002 From: SGI Security Coordinator To: agent99@sgi.com Newsgroups: comp.sys.sgi.announce, comp.security.unix, comp.sys.sgi.admin, comp.security.announce Date: Wed, 4 Dec 2002 14:31:04 -0800 Subject: Buffer Overflow Vulnerability in X Font Server on IRIX -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title : Buffer Overflow Vulnerability in X Font Server Number : 20021202-01-I Date : December 4, 2002 Reference: CERT CA-2002-34, VU#312313 Reference: ISS X-Force Alert #21541 Reference: CVE CAN-2002-1317 Fixed in : IRIX 6.5.14 ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- It's been reported that there is a buffer overflow vulnerability in the X font server used in IRIX versions prior to 6.5.14. It was discovered, as part of the non-security related X11 updates done to IRIX 6.5.14, this vulnerability was fixed. See the following URLs for additional details: http://www.cert.org/advisories/CA-2002-34.html http://www.kb.cert.org/vuls/id/312313 http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21541 CERT assigned the following CVE candidates to this vulnerability: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1317 SGI has investigated the issue and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. This issue has been corrected in IRIX 6.5.14 and later versions. - -------------- - --- Impact --- - -------------- The /usr/bin/X11/xfs binary is installed by default on IRIX 6.5 systems as part of x_eoe.sw.Server. To determine the version of IRIX you are running, execute the following command: # /bin/uname -R That will return a result similar to the following: # 6.5 6.5.16f The first number ("6.5") is the release name, the second ("6.5.16f" in this case) is the extended release name. The extended release name is the "version" we refer to throughout this document. This vulnerability can be exploited by a remote user (no account on the local machine is required), and can result in the remote user gaining root access. - ---------------------------- - --- Temporary Workaround --- - ---------------------------- SGI understands that there are times when upgrading the operating system or installing patches are inconvenient or not possible. In those instances, we recommend the following workaround: # chkconfig fontserver off # /etc/init.d/fontserver stop Of course, you will no longer have the services of the font server available after doing this. SGI recommends upgrading to IRIX 6.5.14 or later as a permanent fix for this problem. - ---------------- - --- Solution --- - ---------------- SGI has not provided patches for this vulnerability. Our recommendation is to upgrade to IRIX 6.5.14 or later. OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x unknown Note 1 IRIX 4.x unknown Note 1 IRIX 5.x unknown Note 1 IRIX 6.0.x unknown Note 1 IRIX 6.1 unknown Note 1 IRIX 6.2 unknown Note 1 IRIX 6.3 unknown Note 1 IRIX 6.4 unknown Note 1 IRIX 6.5 yes Notes 2 & 3 IRIX 6.5.1 yes Notes 2 & 3 IRIX 6.5.2 yes Notes 2 & 3 IRIX 6.5.3 yes Notes 2 & 3 IRIX 6.5.4 yes Notes 2 & 3 IRIX 6.5.5 yes Notes 2 & 3 IRIX 6.5.6 yes Notes 2 & 3 IRIX 6.5.7 yes Notes 2 & 3 IRIX 6.5.8 yes Notes 2 & 3 IRIX 6.5.9 yes Notes 2 & 3 IRIX 6.5.10 yes Notes 2 & 3 IRIX 6.5.11 yes Notes 2 & 3 IRIX 6.5.12 yes Notes 2 & 3 IRIX 6.5.13 yes Notes 2 & 3 IRIX 6.5.14 no IRIX 6.5.15 no IRIX 6.5.16 no IRIX 6.5.17 no IRIX 6.5.18 no IRIX 6.5.19 no NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/irix/news/index.html#policy for more information. 2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your SGI Support Provider or URL: http://support.sgi.com/irix/swupdates/ 3) Upgrade to IRIX 6.5.14 or later. - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank ISS X-Force and the users of the Internet Community at large for their assistance in this matter. - ------------- - --- Links --- - ------------- SGI Security Advisories can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/advisories/ SGI Security Patches can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/patches/ SGI patches for IRIX can be found at the following patch servers: http://support.sgi.com/irix/ and ftp://patches.sgi.com/ SGI freeware updates for IRIX can be found at: http://freeware.sgi.com/ SGI fixes for SGI open sourced code can be found on: http://oss.sgi.com/projects/ SGI patches and RPMs for Linux can be found at: http://support.sgi.com/linux/ or http://oss.sgi.com/projects/sgilinux-combined/download/security-fixes/ SGI patches for Windows NT or 2000 can be found at: http://support.sgi.com/nt/ IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at: http://support.sgi.com/irix/ and ftp://patches.sgi.com/support/patchset/ IRIX 6.5 Maintenance Release Streams can be found at: http://support.sgi.com/colls/patches/tools/relstream/index.html IRIX 6.5 Software Update CDs can be obtained from: http://support.sgi.com/irix/swupdates/ The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com (216.32.174.211). Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ For security and patch management reasons, ftp.sgi.com (mirrors patches.sgi.com security FTP repository) lags behind and does not do a real-time update. - ----------------------------------------- - --- SGI Security Information/Contacts --- - ----------------------------------------- If there are questions about this document, email can be sent to security-info@sgi.com. ------oOo------ SGI provides security information and patches for use by the entire SGI community. This information is freely available to any person needing the information and is available via anonymous FTP and the Web. The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com (216.32.174.211). Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ The SGI Security Headquarters Web page is accessible at the URL: http://www.sgi.com/support/security/ For issues with the patches on the FTP sites, email can be sent to security-info@sgi.com. For assistance obtaining or working with security patches, please contact your SGI support provider. ------oOo------ SGI provides a free security mailing list service called wiretap and encourages interested parties to self-subscribe to receive (via email) all SGI Security Advisories when they are released. Subscribing to the mailing list can be done via the Web (http://www.sgi.com/support/security/wiretap.html) or by sending email to SGI as outlined below. % mail wiretap-request@sgi.com subscribe wiretap end ^d In the example above, is the email address that you wish the mailing list information sent to. The word end must be on a separate line to indicate the end of the body of the message. The control-d (^d) is used to indicate to the mail program that you are finished composing the mail message. ------oOo------ SGI provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/support/security/ . ------oOo------ If there are general security questions on SGI systems, email can be sent to security-info@sgi.com. For reporting *NEW* SGI security issues, email can be sent to security-alert@sgi.com or contact your SGI support provider. A support contract is not required for submitting a security report. ______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, SGI is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBPe6BE7Q4cFApAP75AQFGzAQAkT2EYd4petVHe8YCScBZVQseM9mzmXr3 cqqHqu7vJ6XWQjYNrENXgYDlnOLGAQWTjhO20p/akYLlPXLVXyqxdx7bnbQAlMVa 2voBe5cHzj8nyTCWWC4Z0i+0gF72OqSX7biJuPzCIOgyHOquzn5qSfa+dnkMpqG+ Md8Ew45lnak= =vcRO -----END PGP SIGNATURE-----