From agent99@sgi.com Tue Jan 29 03:55:12 2002 From: SGI Security Coordinator To: agent99@sgi.com Date: Mon, 28 Jan 2002 13:43:27 -0800 (PST) Subject: [VulnWatch] SGI IRIX: Various shells create temporary files insecurely update [The following text is in the "iso-8859-1" character set] [Your display is set for the "US-ASCII" character set] [Some characters may be displayed incorrectly] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title: Various shells create temporary files insecurely Number: 20011103-02-P Date: January 28, 2002 Reference: SGI Security Advisory 20011103-01-I Reference: CERT/CC® Vulnerability Note VU#10277 Reference: CVE CAN-2000-1134 ______________________________________________________________________________ SGI provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. SGI recommends that this information be acted upon as soon as possible. SGI provides the information in this Security Advisory on an "AS-IS" basis only, and disclaims all warranties with respect thereto, express, implied or otherwise, including, without limitation, any warranty of merchantability or fitness for a particular purpose. In no event shall SGI be liable for any loss of profits, loss of business, loss of data or for any indirect, special, exemplary, incidental or consequential damages of any kind arising from your use of, failure to use or improper use of any of the instructions or information in this Security Advisory. ______________________________________________________________________________ - -------------- - --- Update --- - -------------- As part of on going security efforts, SGI has released patch 4469 and 4470 for this security issue. The original text from SGI Security Advisory 20011103-01-I has been updated to reflect this change. - ----------------------- - --- Issue Specifics --- - ----------------------- Gordon Irlam of the University of Adelaide, Australia reported that sh uses /tmp files of a predictable name in creating files for input redirection using the << operator. Further investigation shows that tcsh, csh, sh, and bash on various Unix systems also exhibit the same behavior. See http://www.kb.cert.org/vuls/id/10277 for additional details. 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 future releases of IRIX. - -------------- - --- Impact --- - -------------- The tcsh, bsh, and ksh shells are installed by default on IRIX. A local user account on the vulnerable system is required in order to exploit these shells. The exploitation of these temporary files can lead to a root compromise. This could be the case in the context of shell scripts run as root. Original SGI Security Advisory: ftp://patches.sgi.com/support/free/security/advisories/20011103-01-I CERT reported this shell vulnerability: http://www.kb.cert.org/vuls/id/10277 CVE reported a derivative: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2000-1134 These shell vulnerabilities have been publicly discussed in Usenet newsgroups and mailing lists. - ---------------- - --- Solution --- - ---------------- SGI has provided patches for these vulnerabilities for IRIX 6.5.10m/f through 6.5.13m/f. The problems have been fixed in IRIX 6.5.14m and 6.5.14f. Our recommendation is to install the appropriate patch for your operating system or upgrade to IRIX 6.5.14. 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 6.5.10m yes 4469 Note 3 IRIX 6.5.10f yes 4470 Note 3 IRIX 6.5.11m yes 4469 Note 3 IRIX 6.5.11f yes 4470 Note 3 IRIX 6.5.12m yes 4469 Note 3 IRIX 6.5.12f yes 4470 Note 3 IRIX 6.5.13m yes 4469 Note 3 IRIX 6.5.13f yes 4470 Note 3 IRIX 6.5.14m no Note 3 IRIX 6.5.14f no Note 3 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) Download the IRIX 6.5.14 Maintenance Release Stream from the URL: http://support.sgi.com/colls/patches/tools/relstream/index.html 3) 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/ ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.4469 Algorithm #1 (sum -r): 01629 8 README.patch.4469 Algorithm #2 (sum): 32479 8 README.patch.4469 MD5 checksum: 6E13306A54EA586BED13A20BD2E03C85 Filename: patchSG0004469 Algorithm #1 (sum -r): 42382 2 patchSG0004469 Algorithm #2 (sum): 46610 2 patchSG0004469 MD5 checksum: 2F46BA267D4662AD21E6706E4A19A419 Filename: patchSG0004469.eoe_sw Algorithm #1 (sum -r): 57846 1765 patchSG0004469.eoe_sw Algorithm #2 (sum): 55752 1765 patchSG0004469.eoe_sw MD5 checksum: 084BEDDC3A5E8CD7C850A624C699770E Filename: patchSG0004469.idb Algorithm #1 (sum -r): 22610 2 patchSG0004469.idb Algorithm #2 (sum): 52668 2 patchSG0004469.idb MD5 checksum: 877335189390C6204F72628B73CA871C Filename: README.patch.4470 Algorithm #1 (sum -r): 53349 8 README.patch.4470 Algorithm #2 (sum): 32340 8 README.patch.4470 MD5 checksum: 56D7C0A042C928C4E213DA344086F2A7 Filename: patchSG0004470 Algorithm #1 (sum -r): 53607 2 patchSG0004470 Algorithm #2 (sum): 48117 2 patchSG0004470 MD5 checksum: 6507BE3943D55B89CC9BA499DD81858C Filename: patchSG0004470.eoe_sw Algorithm #1 (sum -r): 61098 1879 patchSG0004470.eoe_sw Algorithm #2 (sum): 2436 1879 patchSG0004470.eoe_sw MD5 checksum: D3AE68A434CB55E7D51EF09150279C15 Filename: patchSG0004470.idb Algorithm #1 (sum -r): 04347 2 patchSG0004470.idb Algorithm #2 (sum): 52706 2 patchSG0004470.idb MD5 checksum: 867D317439B3E150E93FA6A044EFC3EC - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank Gordon Irlam, CVE, the CERT Coordination Center, Walter Roberson of National Research Council Canada and the users of the Internet Community at large for their assistance in this matter. - ------------------ - --- References --- - ------------------ 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). 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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 iQCVAwUBPFXC57Q4cFApAP75AQE72AP9G99hp72yrxqbpXlJ8oW6xLRtcYG7fFAw lykPX1C/BFe2TkSGmmcHb48f8k9/Kc2FT7PrAYpfzoz2Y7SouyAX7HZJWEONSQ3e B9PDRhQ9pNCq7jT3qPTrSDcbKc3zRT3fiYUdQz7G6EN9GgvnQeSesR2rGq2uqOXF ZtvOXexvorM= =dJrc -----END PGP SIGNATURE-----