From agent99@boytoy.csd.sgi.com Thu Apr 2 18:14:43 1998 From: SGI Security Coordinator To: agent99@boytoy.csd.sgi.com Date: Thu, 2 Apr 1998 13:49:26 -0800 Subject: lp(1) Security Vulnerabilities DISTRIBUTION RESTRICTIONS - NONE - FOR PUBLIC RELEASE -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: lp(1) Security Vulnerabilities Title: AUSCERT AA-96.12 Number: 19980402-01-PX Date: April 2, 1998 ______________________________________________________________________________ Silicon Graphics provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. Silicon Graphics recommends that this information be acted upon as soon as possible. Silicon Graphics 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 Silicon Graphics 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. ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- The lp(1) program is used to submit files for printing. A potential buffer overflow condition has been identified with the lp(1) program and associated printing subsystem. With an appropriately crafted set of arguments, arbitrary user commands could be executed with elevated privileges. Silicon Graphics Inc. has investigated the issue and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL SGI systems. This issue will be corrected in future releases of IRIX. - -------------- - --- Impact --- - -------------- The lp(1) program and printing subsystem are installed by default on all IRIX systems. A local account is required in order to exploit this vulnerability both locally and remotely. This vulnerability can be utilized to execute commands with root privileges. This vulnerability has been publically discussed and related issues have been reported in AUSCERT advisory AA-96.12. - -------------------------- - --- Temporary Solution --- - -------------------------- Although patches are available for this issue, it is realized that there may be situations where installing the patches immediately may not be possible. The steps below can be used to remove the vulnerability by removing the printing subsystem. *************** *** WARNING *** *************** Removing the print subsystem will remove all printing capability from the system. Installing the patches below is recommended over removal of the print subsystem. If the print subsystem is removed, at a later time when the patches below are to be installed, the print subsystem will first have to be reinstalled from original IRIX distribution CDs before the patches. 1) Become the root user on the system. % /bin/su - Password: # 2) Remove the vulnerable subsystem. # /usr/sbin/versions -v remove print 3) Return to previous level. # exit $ - ---------------- - --- Solution --- - ---------------- OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x no IRIX 4.x no IRIX 5.0.x yes not avail Note 1 IRIX 5.1.x yes not avail Note 1 IRIX 5.2 yes not avail Note 1 IRIX 5.3 yes 2166 IRIX 6.0.x yes not avail Note 1 IRIX 6.1 yes not avail Note 1 IRIX 6.2 yes 2167 IRIX 6.3 yes 2168 IRIX 6.4 yes 2169 NOTES 1) upgrade operating system or see "Temporary Solution" section. Patches are available via anonymous FTP and your service/support provider. The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its mirror, ftp.sgi.com. Security information and patches can be found in the ~ftp/security and ~ftp/patches directories, respectfully. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.2166 Algorithm #1 (sum -r): 33606 8 README.patch.2166 Algorithm #2 (sum): 23714 8 README.patch.2166 MD5 checksum: 95B0AB6CE4C96D7BA22F520360B9A4F7 Filename: patchSG0002166 Algorithm #1 (sum -r): 39199 1 patchSG0002166 Algorithm #2 (sum): 29039 1 patchSG0002166 MD5 checksum: E44479E23F273051BFA04491524B2C8F Filename: patchSG0002166.idb Algorithm #1 (sum -r): 41214 1 patchSG0002166.idb Algorithm #2 (sum): 37103 1 patchSG0002166.idb MD5 checksum: B855B3AFEBC0606F88697EC1EA961824 Filename: patchSG0002166.print_sw Algorithm #1 (sum -r): 64133 81 patchSG0002166.print_sw Algorithm #2 (sum): 39793 81 patchSG0002166.print_sw MD5 checksum: F3ADEE60570BF69DE537D16CCE7D35D0 Filename: README.patch.2167 Algorithm #1 (sum -r): 54129 8 README.patch.2167 Algorithm #2 (sum): 24902 8 README.patch.2167 MD5 checksum: CAD788CE10F8C26EF5ECB1CBBBB9990F Filename: patchSG0002167 Algorithm #1 (sum -r): 32110 1 patchSG0002167 Algorithm #2 (sum): 31366 1 patchSG0002167 MD5 checksum: CC3EE93FE5D4A52E394D6F2FE82F787E Filename: patchSG0002167.idb Algorithm #1 (sum -r): 11685 1 patchSG0002167.idb Algorithm #2 (sum): 36835 1 patchSG0002167.idb MD5 checksum: E568F4180BE18E2183E65FAAD7CE342B Filename: patchSG0002167.print_sw Algorithm #1 (sum -r): 14051 101 patchSG0002167.print_sw Algorithm #2 (sum): 31600 101 patchSG0002167.print_sw MD5 checksum: 7EDB4F42375940427B97EC2E8F949C70 Filename: README.patch.2168 Algorithm #1 (sum -r): 22298 8 README.patch.2168 Algorithm #2 (sum): 25041 8 README.patch.2168 MD5 checksum: 9C63BB8A301C8052BECB0B02A741A94F Filename: patchSG0002168 Algorithm #1 (sum -r): 11594 1 patchSG0002168 Algorithm #2 (sum): 31103 1 patchSG0002168 MD5 checksum: 934E0CC9BC24F87A74668A00EDE3DC71 Filename: patchSG0002168.idb Algorithm #1 (sum -r): 12942 1 patchSG0002168.idb Algorithm #2 (sum): 36247 1 patchSG0002168.idb MD5 checksum: 97BB1C7385D71AC836C7A884ABE60D15 Filename: patchSG0002168.print_sw Algorithm #1 (sum -r): 19989 100 patchSG0002168.print_sw Algorithm #2 (sum): 39255 100 patchSG0002168.print_sw MD5 checksum: 228F3EB30E9A62166EA7A489F4D5FFEF Filename: README.patch.2169 Algorithm #1 (sum -r): 18635 8 README.patch.2169 Algorithm #2 (sum): 22236 8 README.patch.2169 MD5 checksum: D624EEF3039F8F9A0F429982A3FBB356 Filename: patchSG0002169 Algorithm #1 (sum -r): 52493 1 patchSG0002169 Algorithm #2 (sum): 34907 1 patchSG0002169 MD5 checksum: 31F5566CEA24C3679E659E449B5A23E6 Filename: patchSG0002169.idb Algorithm #1 (sum -r): 54959 1 patchSG0002169.idb Algorithm #2 (sum): 35889 1 patchSG0002169.idb MD5 checksum: D0B5BDA2F16F2B47C74ED1F40C4179B2 Filename: patchSG0002169.print_sw Algorithm #1 (sum -r): 08735 82 patchSG0002169.print_sw Algorithm #2 (sum): 20700 82 patchSG0002169.print_sw MD5 checksum: 8B6C0769E99B57381395570946C0C348 - ------------------------ - --- Acknowledgments --- - ------------------------ Silicon Graphics wishes to thank the Internet community and AUSCERT for their involvement in this matter. - ----------------------------------------------------------- - --- Silicon Graphics Inc. Security Information/Contacts --- - ----------------------------------------------------------- If there are questions about this document, email can be sent to cse-security-alert@sgi.com. ------oOo------ Silicon Graphics 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 information and patches is sgigate.sgi.com (204.94.209.1). Security information and patches are located under the directories ~ftp/security and ~ftp/patches, respectively. The Silicon Graphics Security Headquarters Web page is accessible at the URL http://www.sgi.com/Support/Secur/security.html. For issues with the patches on the FTP sites, email can be sent to cse-security-alert@sgi.com. 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This site is located at http://www.sgi.com/Support/Secur/security.html. ------oOo------ 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, Silicon Graphics is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNSQBkrQ4cFApAP75AQGcXAP/YnqAM+PC41nsGBXFf3RKk3MkY8S5lMm+ 9QkDddi6FVrLaL4cJjARmChzPelidkFyw+PqsZPeGzbaqeUPzcoSlrbvU5RfAmm6 8cOZobntpuE9GTgAETot/ZvtOmxbeclyaZwPGMT9i/8Z4lLWfNf//bozuxUclcnl BHX1KBatNhE= =ecND -----END PGP SIGNATURE-----