__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI Login Vulnerabilities [SGI Security Advisory 20030702-01-P] July 21, 2003 23:00 GMT Number N-123 ______________________________________________________________________________ PROBLEM: Logging into an IRIX 6.5 machine while particular environment variables are set can lead to /usr/lib/iaf/scheme (login) dumping core. PLATFORM: IRIX 6.5 systems DAMAGE: "Scheme" is suid root, therefore this could potentially lead to a root compromise. SOLUTION: Upgrade to IRIX 6.5.21 or apply patches stated in SGI's bulletin. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. The scheme binary is installed by default ASSESSMENT: on IRIX 6.5 systems as part of eoe.sw.base. A local account is required to exploit any of these vulnerabilities. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-123.shtml ORIGINAL BULLETIN: ftp://patches.sgi.com/support/free/security/advisories /20030702-01-P ______________________________________________________________________________ [***** Start SGI Security Advisory 20030702-01-P *****] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title : Login Vulnerabilities Number : 20030702-01-P Date : July 16, 2003 Reference: CVE CAN-2003-0574 Reference: SGI BUGS 850587 889119 Fixed in : IRIX 6.5.21 or patch 5182 ______________________________________________________________________________ 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. ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- It's been reported that logging into an IRIX 6.5 machine while particular environment variables are set can lead to /usr/lib/iaf/scheme (login) dumping core. Since "scheme" is suid root, this could potentially lead to a root compromise. A local account would be required to exploit any such vulnerability. This issue was assigned the following CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0574 Please note that this is not the same issue as reported in CERT advisory CA-2001-34 or CERT advisory CA-1997-21 (CVE-1999-0028). 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. These issues have been corrected in future releases of IRIX. - -------------- - --- Impact --- - -------------- The scheme binary is installed by default on IRIX 6.5 systems as part of eoe.sw.base. 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 6.5.19f 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. - ---------------------------- - --- Temporary Workaround --- - ---------------------------- There is no effective workaround available for these problems. SGI recommends either upgrading to IRIX 6.5.21, or installing the appropriate patch from the listing below. - ---------------- - --- Solution --- - ---------------- SGI has provided a series of patches for these vulnerabilities. Our recommendation is to upgrade to IRIX 6.5.21, or install the appropriate patch. 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 yes Notes 2 & 3 IRIX 6.5.15 yes Notes 2 & 3 IRIX 6.5.16 yes 5182 Notes 2 & 4 IRIX 6.5.17 yes 5182 Notes 2 & 4 IRIX 6.5.18 yes 5182 Notes 2 & 4 IRIX 6.5.19 yes 5182 Notes 2 & 4 IRIX 6.5.20 yes 5182 Notes 2 & 4 IRIX 6.5.21 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 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 3) Upgrade to IRIX 6.5.21 or later. 4) Install patch 5182. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.5182 Algorithm #1 (sum -r): 38247 8 README.patch.5182 Algorithm #2 (sum): 42384 8 README.patch.5182 MD5 checksum: 0176171441AE46078FDBB1DB630C8397 Filename: patchSG0005182 Algorithm #1 (sum -r): 40388 2 patchSG0005182 Algorithm #2 (sum): 1995 2 patchSG0005182 MD5 checksum: B5A294E9B777C62DF04CEC66012BEFA8 Filename: patchSG0005182.eoe_sw Algorithm #1 (sum -r): 33077 76 patchSG0005182.eoe_sw Algorithm #2 (sum): 57300 76 patchSG0005182.eoe_sw MD5 checksum: 84429D3529CE8B6F09508EDF68037580 Filename: patchSG0005182.idb Algorithm #1 (sum -r): 23124 2 patchSG0005182.idb Algorithm #2 (sum): 42608 2 patchSG0005182.idb MD5 checksum: 367E564FC2EC650A0B632EB0EC9374E1 - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank Walter Roberson, FIRST 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/ and ftp://patches.sgi.com/ SGI freeware updates for IRIX can be found at: http://freeware.sgi.com/ SGI patches and RPMs for Linux can be found at: http://support.sgi.com SGI patches for Windows NT or 2000 can be found at: http://support.sgi.com/ IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at: http://support.sgi.com/ and ftp://patches.sgi.com/support/patchset/ IRIX 6.5 Maintenance Release Streams can be found at: http://support.sgi.com/ IRIX 6.5 Software Update CDs can be obtained from: http://support.sgi.com/ The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com. 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. 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 iQCVAwUBPxXR+LQ4cFApAP75AQEkNwP/R1PDHODuJU68C7RhuGH5w6U8Bk4vRudX u4aIEx0/fGxcUIz4VLqebarbilC5YdpS5+Un7mUkjajbBzMWdmwimMRwiKYkFlvf HUqv2+U8OrHrH/lRXa3DDEuyoTzCBEFqjbUUdQ5sLE+GOPlzxnlnKK6iKugBRXS7 VlGTmzsZf+I= =3A/R -----END PGP SIGNATURE----- [***** End SGI Security Advisory 20030702-01-P *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Silicon Graphics, Inc. (SGI) 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 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org 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) N-113: Sun Buffer Overflow in LDAP Name Service N-114: Buffer Overrun in Microsoft HTML Converter Could Allow Code Execution N-115: Buffer Overrun in Microsoft Windows Could Lead to Data Corruption N-116: Flaw in Microsoft Windows Message Handling through Utility Manager Could Enable Privilege Elevation N-117: Microsoft RPC Interface Buffer Overrun Vulnerability N-118: Cisco IOS Interface Blocked by IPv4 Packet N-119: Microsoft Internet Security and Acceleration (ISA) Server Error Pages Could Allow Cross-Site Scripting Attack N-120: Unchecked Buffer in Microsoft Windows Shell Could Enable System Compromise N-121: Red Hat Updated Mozilla Packages Fix Security Vulnerability N-122: Red Hat Updated 2.4 Kernel Fixes Vulnerabilities