-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI IRIX Vulnerabilities (syserr and permissions programs) November 19, 1997 23:00 GMT Number I-015 ______________________________________________________________________________ PROBLEM: Two vulnerabilities have been identified in IRIX programs; the syserr program manipulates certain history and configuration files, and the permissions tool allows users to modify the Owner, Group and Others permission bits for files and directories. PLATFORM: SGI systems running IndigoMagic Desktop and Desktop System Monitor subsystems DAMAGE: With a local account, these vulnerabilities can be exploited both locally and remotely. Utilizing the syserr vulnerability, random files can be created and corrupted. With the permissions vulnerability, access can be gained as a privileged user. SOLUTION: Apply available patches or workarounds. ______________________________________________________________________________ VULNERABILITY Both of these security issues have been publically disclosed ASSESSMENT: and discussed in several public forums. It is HIGHLY RECOMMENDED that these measures be implemented on ALL SGI systems running the listed subsystems. ______________________________________________________________________________ [ Start Silicon Graphics Advisory ] - -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX syserr and permissions programs Number: 19971103-01-PX Date: November 18, 1997 ______________________________________________________________________________ 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 --- - ------------------------ This advisory covers two security issues that were public reported as two different issues. Both these issues have been addressed together as one issue by Silicon Graphics. The first vulnerability involves the syserr program. The System Error Notification Broker (syserr) program is part of the Desktop System Monitor which monitors the system for user defined events and then provides notification and/or action when those events occur. As part of normal operation, the syserr program manipulates certain history and configuration files. A security issue was found in these file operations. The second issue involves the permissions tool found in the Indigo Magic Desktop environment. The permissions tool allows users to modify the Owner, Group and Others permission bits for files and directories. A security issue was found in the operation of the permissions tool. Silicon Graphics Inc. has investigated these issues and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL SGI systems. These issues will be corrected in future releases of IRIX. - --------------- - ---- Impact --- - --------------- The IndigoMagic Desktop and Desktop System Monitor subsystems, which contain the permissions and syserr programs respectively, are installed by default on all desktop systems. These subsystems may also be installed on other non-desktop systems. Both of these issues require a local account for these vulnerabilities to be exploited. With a local account, these vulnerabilities can be exploited both locally and remotely. Utilizing the syserr vulnerability, random files can be created and corrupted. With the permissions vulnerability, access can be gained as a privileged user. Both of these security issues have been publically disclosed and discussed in several public forums. - --------------------------- - ---- 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 permissions of the syserr and permissions programs. 1) Become the root user on the system. % /bin/su - Password: # 2) Change the permissions on the programs. # /bin/chmod 500 /usr/sbin/syserr # /bin/chmod 500 /usr/lib/desktop/permissions ************ *** NOTE *** ************ Removing the permissions from these programs will prevent non-root users and programs from using these programs. 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 2238 & 2273 IRIX 6.0.x yes not avail Note 1 IRIX 6.1 yes not avail Note 1 IRIX 6.2 yes 2239 IRIX 6.3 yes 2240 IRIX 6.4 yes 2241 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.2238 Algorithm #1 (sum -r): 33138 8 README.patch.2238 Algorithm #2 (sum): 54609 8 README.patch.2238 MD5 checksum: 06FEA4B87EFAAC414D93C02286BDC43F Filename: patchSG0002238 Algorithm #1 (sum -r): 42580 4 patchSG0002238 Algorithm #2 (sum): 17470 4 patchSG0002238 MD5 checksum: 2B3CB2B7A1A34A060471F5EAFEC3C8D2 Filename: patchSG0002238.idb Algorithm #1 (sum -r): 28213 14 patchSG0002238.idb Algorithm #2 (sum): 165 14 patchSG0002238.idb MD5 checksum: 64C63FE7812F66F70AA9F768108CC83E Filename: patchSG0002238.insight_sw Algorithm #1 (sum -r): 14141 6000 patchSG0002238.insight_sw Algorithm #2 (sum): 32280 6000 patchSG0002238.insight_sw MD5 checksum: 9CD26F3BD01FDB3B897713E4D1CB0903 Filename: patchSG0002238.sysmon_books Algorithm #1 (sum -r): 24973 432 patchSG0002238.sysmon_books Algorithm #2 (sum): 12014 432 patchSG0002238.sysmon_books MD5 checksum: FBD60185ECA52E1004A2149C076387D3 Filename: patchSG0002238.sysmon_sw Algorithm #1 (sum -r): 26734 104 patchSG0002238.sysmon_sw Algorithm #2 (sum): 54767 104 patchSG0002238.sysmon_sw MD5 checksum: A8B3E9CC35940ECE8A3B12EB19F60F1C Filename: README.patch.2239 Algorithm #1 (sum -r): 64560 8 README.patch.2239 Algorithm #2 (sum): 52155 8 README.patch.2239 MD5 checksum: 55BBC5958A1FF9BC54043EB0CA11DEE2 Filename: patchSG0002239 Algorithm #1 (sum -r): 62613 5 patchSG0002239 Algorithm #2 (sum): 43481 5 patchSG0002239 MD5 checksum: 3FAEE6B9D75F5B83A841F7F062EF7B76 Filename: patchSG0002239.desktop_eoe_sw Algorithm #1 (sum -r): 08003 107 patchSG0002239.desktop_eoe_sw Algorithm #2 (sum): 62904 107 patchSG0002239.desktop_eoe_sw MD5 checksum: 7D82A6EC707766C9656D70C278977875 Filename: patchSG0002239.idb Algorithm #1 (sum -r): 07661 12 patchSG0002239.idb Algorithm #2 (sum): 38563 12 patchSG0002239.idb MD5 checksum: E8E34B1179B0F1E293207C7122BCD9E9 Filename: patchSG0002239.sysadmdesktop_sw Algorithm #1 (sum -r): 65280 2881 patchSG0002239.sysadmdesktop_sw Algorithm #2 (sum): 46052 2881 patchSG0002239.sysadmdesktop_sw MD5 checksum: 902DD8070EE355A0670F1E82046C1C2B Filename: patchSG0002239.sysmon_sw Algorithm #1 (sum -r): 45274 95 patchSG0002239.sysmon_sw Algorithm #2 (sum): 46934 95 patchSG0002239.sysmon_sw MD5 checksum: 5DC4DD1021C72E58B96DBB6407D98729 Filename: README.patch.2240 Algorithm #1 (sum -r): 24466 7 README.patch.2240 Algorithm #2 (sum): 19111 7 README.patch.2240 MD5 checksum: 3BC19EB3BDA842471A47070AD1FF61CD Filename: patchSG0002240 Algorithm #1 (sum -r): 48056 1 patchSG0002240 Algorithm #2 (sum): 31171 1 patchSG0002240 MD5 checksum: D0C0BD5AC20A36D88E8BC6241429F078 Filename: patchSG0002240.idb Algorithm #1 (sum -r): 50798 1 patchSG0002240.idb Algorithm #2 (sum): 39448 1 patchSG0002240.idb MD5 checksum: 351BF9721D0FB68900672DBE1B4471D8 Filename: patchSG0002240.sysmon_sw Algorithm #1 (sum -r): 31291 79 patchSG0002240.sysmon_sw Algorithm #2 (sum): 13465 79 patchSG0002240.sysmon_sw MD5 checksum: 60BEFBD357F36F386260B3C9E7692B4F Filename: README.patch.2241 Algorithm #1 (sum -r): 49732 7 README.patch.2241 Algorithm #2 (sum): 19173 7 README.patch.2241 MD5 checksum: FF3183312FB43F3BFC0BF286BCC319B2 Filename: patchSG0002241 Algorithm #1 (sum -r): 44510 1 patchSG0002241 Algorithm #2 (sum): 32569 1 patchSG0002241 MD5 checksum: F187DE8830FFAB8BF2850DF0605606B7 Filename: patchSG0002241.idb Algorithm #1 (sum -r): 63962 1 patchSG0002241.idb Algorithm #2 (sum): 39424 1 patchSG0002241.idb MD5 checksum: 33A0B768CF9FF2C5730F23FD1CDD1339 Filename: patchSG0002241.sysmon_sw Algorithm #1 (sum -r): 62550 84 patchSG0002241.sysmon_sw Algorithm #2 (sum): 16142 84 patchSG0002241.sysmon_sw MD5 checksum: C67EBFE66258F0D5A0641EC5C7A3B43C Filename: README.patch.2273 Algorithm #1 (sum -r): 09906 10 README.patch.2273 Algorithm #2 (sum): 48872 10 README.patch.2273 MD5 checksum: EB63F8B61B7C20144DC73F664FFC6532 Filename: patchSG0002273 Algorithm #1 (sum -r): 52671 3 patchSG0002273 Algorithm #2 (sum): 38361 3 patchSG0002273 MD5 checksum: 07B7E6E002B7C0D578B3919629FF5AF9 Filename: patchSG0002273.desktop_eoe_sw Algorithm #1 (sum -r): 25464 108 patchSG0002273.desktop_eoe_sw Algorithm #2 (sum): 64994 108 patchSG0002273.desktop_eoe_sw MD5 checksum: 9C3453CA8D32FF16CFF4FB0B13FC983F Filename: patchSG0002273.idb Algorithm #1 (sum -r): 33091 12 patchSG0002273.idb Algorithm #2 (sum): 50364 12 patchSG0002273.idb MD5 checksum: 62C67DB1B5070D4457B6462BD30349C5 Filename: patchSG0002273.sysadmdesktop_sw Algorithm #1 (sum -r): 02318 2872 patchSG0002273.sysadmdesktop_sw Algorithm #2 (sum): 22358 2872 patchSG0002273.sysadmdesktop_sw MD5 checksum: B08A2078F4F37FF8165542158717E8A5 - ------------------------- - ---- Acknowledgments --- - ------------------------- Silicon Graphics wishes to thank AUSCERT and CERT Coordination Center organizations for their assistance 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/security/security.html. For issues with the patches on the FTP sites, email can be sent to cse-security-alert@sgi.com. For assistance obtaining or working with security patches, please contact your SGI support provider. ------oOo------ Silicon Graphics 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------ Silicon Graphics provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/Support/security/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 iQCVAwUBNHIdvLQ4cFApAP75AQEtQwQAuFKKAexhrpXTRCq2tOgWzS8cMP8x0So+ 7FjQB1Sgkgqf5iCxd1kg4MkgqlbWbTT5ibzYjOwyHzwo2uEGQ5FbzHIwN3GQJ7n6 bYKNXR9/lke08jTAsFQbZlyc67h5IR22JUH984gChbqeWqLEMrrGkPyj3ioodtoH fy5cz8RAux0= =N2Fr - -----END PGP SIGNATURE----- [ End Silicon Graphics Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Silicon Graphics 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). 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Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://ciac.llnl.gov/ Anonymous FTP: ciac.llnl.gov (198.128.39.53) Modem access: +1 (510) 423-4753 (28.8K baud) +1 (510) 423-3331 (28.8K baud) CIAC has several self-subscribing mailing lists for electronic publications: 1. CIAC-BULLETIN for Advisories, highest priority - time critical information and Bulletins, important computer security information; 2. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 3. SPI-NOTES, for discussion of problems and solutions regarding the use of SPI products. Our mailing lists are managed by a public domain software package called Majordomo, which ignores E-mail header subject lines. 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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. 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