-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI IRIX at(1) Vulnerability October 7, 1998 22:00 GMT Number J-005 ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in the at(1) program which allows commands to be executed at a later time. PLATFORM: Installed by default on all IRIX systems. DAMAGE: If exploited, a local user could read any file on the system. SOLUTION: Apply patches or workaround. ______________________________________________________________________________ VULNERABILITY Risk is high. This vulnerability has been publicly discussed ASSESSMENT: in Usenet newsgroups and mailing lists. ______________________________________________________________________________ [ Start Silicon Graphics Inc. Advisory ] - -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX at(1) vulnerability Title: NetBSD Security Advisory 1998-004 Number: 19981001-01-PX Date: October 5, 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 at(1) program is used to execute commands at a later time. Unfortunately, a vulnerability has been discovered in the at(1) program that allows any file on the system to be read. 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 vulnerable SGI systems. This issue will be corrected in future releases of IRIX. - ---------------- - ----- Impact --- - ---------------- The at(1) program is installed by default on all IRIX systems. Only IRIX 6.2, 6.4, 6.5 and 6.5.1 are vulnerable. A local account is required in order to exploit the at(1) vulnerability locally and remotely. The vulnerability allows a local user to read any file on the system. This vulnerability was reported by NetBSD Security Advisory 1998-004. This vulnerability has been publically discussed in Usenet newsgroups and mailing lists. - ---------------------------- - ----- 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 minimize the vulnerability by restricting access to the vulnerable program. 1) Become the root user on the system. % /bin/su - Password: # 2) Change the permissions on the vulnerable program. # /bin/chmod 500 /usr/bin/at ************ *** NOTE *** ************ Removing group and other permissions from the vulnerable program will prevent non-root users from accessing the at(1) program. 3) Verify the new permissions on the program. Note that the program size may be different depending on release. # ls -al /usr/bin/at -r-x------ 1 root sys 37896 Feb 20 16:53 at 4) Return to the previous user level. # exit % - ------------------ - ----- Solution --- - ------------------ OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x no IRIX 4.x no IRIX 5.0.x no IRIX 5.1.x no IRIX 5.2 no IRIX 5.3 no IRIX 6.0.x no IRIX 6.1 no IRIX 6.2 yes 3182 IRIX 6.3 no IRIX 6.4 yes 3184 IRIX 6.5 yes 3286 IRIX 6.5.1 yes 3286 Note 1 NOTES 1) If you have not received an IRIX 6.5.1m CD for IRIX 6.5, contact your SGI Support Provider or download the IRIX 6.5.1 Maintenance Release Stream from http://support.sgi.com/ Patches are available via anonymous FTP and your service/support provider. The primary SGI anonymous FTP site for security information and patches is sgigate.sgi.com (204.94.209.1). Security information and patches can be found in the ~ftp/security and ~ftp/patches directories, respectively. For security and patch management reasons, ftp.sgi.com (mirror of sgigate) lags behind and does not do a real-time update of ~ftp/security and ~ftp/patches. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.3182 Algorithm #1 (sum -r): 30850 16 README.patch.3182 Algorithm #2 (sum): 15553 16 README.patch.3182 MD5 checksum: 3B34D52857D8A561AA21BE5819112251 Filename: patchSG0003182 Algorithm #1 (sum -r): 29381 10 patchSG0003182 Algorithm #2 (sum): 25835 10 patchSG0003182 MD5 checksum: 014FB79336A21F776D4616A40D5ED66A Filename: patchSG0003182.dev_sw Algorithm #1 (sum -r): 29421 167 patchSG0003182.dev_sw Algorithm #2 (sum): 60245 167 patchSG0003182.dev_sw MD5 checksum: F12045EED76A42D9E534473DE145F300 Filename: patchSG0003182.eoe_man Algorithm #1 (sum -r): 49928 732 patchSG0003182.eoe_man Algorithm #2 (sum): 2181 732 patchSG0003182.eoe_man MD5 checksum: 29BDDCEBB3F538BD1417656D68B1C205 Filename: patchSG0003182.eoe_sw Algorithm #1 (sum -r): 50376 4005 patchSG0003182.eoe_sw Algorithm #2 (sum): 8225 4005 patchSG0003182.eoe_sw MD5 checksum: 172E2B997C5383F5D8935CC8A3BDF3E0 Filename: patchSG0003182.idb Algorithm #1 (sum -r): 51467 32 patchSG0003182.idb Algorithm #2 (sum): 38073 32 patchSG0003182.idb MD5 checksum: F6189FD617CEDA6825B1B5DF86445CC6 Filename: README.patch.3184 Algorithm #1 (sum -r): 20261 14 README.patch.3184 Algorithm #2 (sum): 29975 14 README.patch.3184 MD5 checksum: 125A7A950DFC9097C6C09D1968E136E4 Filename: patchSG0003184 Algorithm #1 (sum -r): 37152 8 patchSG0003184 Algorithm #2 (sum): 57889 8 patchSG0003184 MD5 checksum: BA06CC50BE4F60977973DB78881CB2A7 Filename: patchSG0003184.eoe_man Algorithm #1 (sum -r): 36008 213 patchSG0003184.eoe_man Algorithm #2 (sum): 56912 213 patchSG0003184.eoe_man MD5 checksum: 0B0A1B17A8072222CC98894E2B8B7367 Filename: patchSG0003184.eoe_sw Algorithm #1 (sum -r): 32191 1341 patchSG0003184.eoe_sw Algorithm #2 (sum): 60291 1341 patchSG0003184.eoe_sw MD5 checksum: CF1146018BD54154AE99CECE36CCF526 Filename: patchSG0003184.idb Algorithm #1 (sum -r): 05813 14 patchSG0003184.idb Algorithm #2 (sum): 42422 14 patchSG0003184.idb MD5 checksum: 9F1D2A06C70BA5487D730E7DFBEB58B6 Filename: README.patch.3286 Algorithm #1 (sum -r): 55256 8 README.patch.3286 Algorithm #2 (sum): 29002 8 README.patch.3286 MD5 checksum: 73A6F76CD6D1AF8331A7B831C3D97BDB Filename: patchSG0003286 Algorithm #1 (sum -r): 61030 1 patchSG0003286 Algorithm #2 (sum): 34259 1 patchSG0003286 MD5 checksum: 3B58695C1E6B10C2D0C81FA6179B3BB0 Filename: patchSG0003286.eoe_sw Algorithm #1 (sum -r): 10812 61 patchSG0003286.eoe_sw Algorithm #2 (sum): 45331 61 patchSG0003286.eoe_sw MD5 checksum: 03773FA9D7AF436D7CC42044721E242C Filename: patchSG0003286.idb Algorithm #1 (sum -r): 08036 1 patchSG0003286.idb Algorithm #2 (sum): 33655 1 patchSG0003286.idb MD5 checksum: 6E038D350913318648C823ED84B523E6 - -------------------------- - ----- Acknowledgments --- - -------------------------- Silicon Graphics wishes to thank the Internet community at large 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 iQCVAwUBNhk07rQ4cFApAP75AQGkEgP/WPUji1A2TBOF98ADOQUcqO6Sd2L2lQPo 8MOSpyBUXzfQ8hstwblLVMhCDbDrdweYyMJCwj1cILULcLnek/zikmP/tov8nFXx WB1DkYdvMTcP0Tf/4p7mDBDFm8H8BEK7IRGExQBsKIuIfTIJPcLWgREwWLWjRp34 tvUyTU0tyhY= =o/VI - -----END PGP SIGNATURE----- [ End Silicon Graphics Inc. 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). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), call the CIAC voice number 925-422-8193 and leave a message, or call 800-759-7243 (800-SKY-PAGE) to send a Sky Page. CIAC has two Sky Page PIN numbers, the primary PIN number, 8550070, is for the CIAC duty person, and the secondary PIN number, 8550074 is for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 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. To subscribe (add yourself) to one of our mailing lists, send the following request as the E-mail message body, substituting ciac-bulletin, spi-announce OR spi-notes for list-name: E-mail to ciac-listproc@llnl.gov or majordomo@tholia.llnl.gov: subscribe list-name e.g., subscribe ciac-bulletin You will receive an acknowledgment email immediately with a confirmation that you will need to mail back to the addresses above, as per the instructions in the email. This is a partial protection to make sure you are really the one who asked to be signed up for the list in question. If you include the word 'help' in the body of an email to the above address, it will also send back an information file on how to subscribe/unsubscribe, get past issues of CIAC bulletins via email, etc. PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. 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. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) I-087: Microsoft PPTP Security Vulnerabilities I-088: NFS clients rpc.pcnfsd Vulnerability I-089: SGI Seyon Security Vulnerability I-090: HP-UX dtmail/rpc.ttdbserverd Vulnerability I-091: Stack Overflow in ToolTalk RPC Service I-092: Ping Buffer Overflow Vulnerability J-001: Windows NT RPC Spoofing Denial of Service Vulnerability J-002: SGI IRIX Mail(1)/mailx(1) Security Vulnerabilities J-003: SGI IRIX On-Line Customer Registration Vulnerabilities J-004: SunOS ftp client Vulnerability -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBNh0g9rnzJzdsy3QZAQH/fwQAjpSlaNdaUJo22NhVibXiJVDgZ1O1rtUJ JdUV9ybdSYs0hcXg11y0UceCLSyJTyvspA6brGnur6k4MjaDhe91O45jtOLRoQ0b DThEIWlMksyOzm3vqDGo/Xkx3glAlnlUYvLd+4OmoDGfcaGiYD3HAY+dBs38ZY9Z ftoqpGtabOY= =VuhY -----END PGP SIGNATURE-----