__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Center ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI IRIX rpc.espd Buffer Overflow [SGI Security Advisory 20010501-01-P] May 12, 2001 01:00 GMT Number L-080 ______________________________________________________________________________ PROBLEM: An exploitable buffer overflow has been discovered in the Embedded Support Partner (ESP) daemon rpc.espd. PLATFORM: IRIX 6.5.5 through IRIX 6.5.8 are vulnerable. IRIX 6.5.7 and IRIX 6.5.8 systems with patch 4123 are not vulnerable. IRIX 6.5.9 and above are not vulnerable to this issue. DAMAGE: root compromise. SOLUTION: Apply the patches described below. ______________________________________________________________________________ VULNERABILITY VERY HIGH. This is remotely exploitable, and results in a root ASSESSMENT: compromise. ______________________________________________________________________________ [****** Start SGI Advisory ******] ______________________________________________________________________________ SGI Security Advisory Title: IRIX rpc.espd Buffer Overflow Reference: CVE CAN-2001-0331 Number: 20010501-01-P Date: May 9, 2001 ______________________________________________________________________________ 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 --- - ----------------------- Embedded Support Partner (ESP) is an infrastructure that is integrated into the IRIX operating system for the purposes of support. Internet Security Systems (ISS) X-Force has reported that an exploitable buffer overflow has been discovered in ESP daemon rpc.espd which can lead to a root compromise. 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 ESP 2.0 for IRIX 6.5.9 and above. - -------------- - --- Impact --- - -------------- The ESP(1) platform is installed by default on IRIX 6.5.5 and above. IRIX 6.5.5 through IRIX 6.5.8 are vulnerable. IRIX 6.5.7 and IRIX 6.5.8 systems with patch 4123 are not vulnerable. IRIX 6.5.9 and above are not vulnerable to this issue. A local user account on the vulnerable system is not required in order to exploit rpc.espd daemon. The rpc.espd daemon can be exploited remotely over an untrusted network. The exploitable buffer overflow vulnerability can lead to a root compromise. This rpc.espd buffer overflow vulnerability was reported by ISS X-Force: http://xforce.iss.net/ The CVE candidate for this vulnerability is: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0331 - -------------------------- - --- 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 disable the rpc.espd daemon to prevent exploitation of this vulnerability until patches can be installed. 1) Become the root user on the system. % /bin/su - Password: # 2) Change the permissions on the rpc.espd daemon. # /bin/chmod -x /usr/etc/rpc.espd 3) Restart inetd to kill any vulnerable running daemons. # /etc/killall -HUP inetd 4) Return to previous level. # exit % - ---------------- - --- Solution --- - ---------------- The ESP security issue has been fixed in ESP 2.0 for IRIX 6.5.9 and above, and in patch 4123 for IRIX 6.5.7 and 6.5.8. OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x no Note 1 IRIX 4.x no Note 1 IRIX 5.x no Note 1 IRIX 6.0.x no Note 1 IRIX 6.1 no Note 1 IRIX 6.2 no Note 1 IRIX 6.3 no Note 1 IRIX 6.4 no Note 1 IRIX 6.5 no Note 1 IRIX 6.5.1 no Note 1 IRIX 6.5.2 no Note 1 IRIX 6.5.3 no Note 1 IRIX 6.5.4 no Note 1 IRIX 6.5.5 yes Note 1 & 3 IRIX 6.5.6 yes Note 1 & 3 IRIX 6.5.7 yes 4123 Note 1 & 3 IRIX 6.5.8 yes 4123 Note 1 & 3 IRIX 6.5.9 no Note 1 IRIX 6.5.10 no Note 2 IRIX 6.5.11 no Note 4 NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/news/support/index.html#customer_letters for more information. 2) This version of the IRIX operating system is in maintenance mode. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/news/support/index.html#customer_letters for more information. 3) See "Temporary Solution" section. 4) Download the latest IRIX 6.5 Maintenance Release from the URL: http://support.sgi.com/colls/patches/tools/relstream/index.html or contact your local SGI support provider to obtain the latest IRIX 6.5 Maintenance Release CD set. Patches are available via the web, anonymous FTP and from your SGI service/support provider. 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. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.4123 Algorithm #1 (sum -r): 42191 57 README.patch.4123 Algorithm #2 (sum): 8760 57 README.patch.4123 MD5 checksum: 50335F5A79F4E7E1341BFC2D6E7EBA61 Filename: patch4123.chksums.only Algorithm #1 (sum -r): 27629 1 patch4123.chksums.only Algorithm #2 (sum): 11216 1 patch4123.chksums.only MD5 checksum: 49D94C480E673A31450E9900627EC0E4 Filename: patch4123.pgp.and.chksums Algorithm #1 (sum -r): 32624 2 patch4123.pgp.and.chksums Algorithm #2 (sum): 63277 2 patch4123.pgp.and.chksums MD5 checksum: 994CCCFAA8D9F32189ECD9E56AA7EC4D Filename: patchSG0004123 Algorithm #1 (sum -r): 63263 6 patchSG0004123 Algorithm #2 (sum): 61222 6 patchSG0004123 MD5 checksum: 690830DDB9E6AD6B8204B8ABB4DC7355 Filename: patchSG0004123.eoe_books Algorithm #1 (sum -r): 17575 13187 patchSG0004123.eoe_books Algorithm #2 (sum): 56328 13187 patchSG0004123.eoe_books MD5 checksum: 8DB739C7EC99953046FCB36683F4A19E Filename: patchSG0004123.eoe_man Algorithm #1 (sum -r): 32417 132 patchSG0004123.eoe_man Algorithm #2 (sum): 61773 132 patchSG0004123.eoe_man MD5 checksum: 7C674D827EEED0DF8DD68A48C722EE6C Filename: patchSG0004123.eoe_sw Algorithm #1 (sum -r): 53412 10081 patchSG0004123.eoe_sw Algorithm #2 (sum): 33482 10081 patchSG0004123.eoe_sw MD5 checksum: 23303AE759B3CEA75CE9CE3E56215829 Filename: patchSG0004123.eoe_sw64 Algorithm #1 (sum -r): 18041 19 patchSG0004123.eoe_sw64 Algorithm #2 (sum): 8176 19 patchSG0004123.eoe_sw64 MD5 checksum: D6B07A95299A25B4D5C3A48C55DF6F43 Filename: patchSG0004123.idb Algorithm #1 (sum -r): 40104 247 patchSG0004123.idb Algorithm #2 (sum): 23426 247 patchSG0004123.idb MD5 checksum: 4B4FD1F676A230169E598904EACFAC1D - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank Internet Security Systems (ISS) X-Force for their assistance in this matter. - ----------------------------------------- - --- 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). 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 cse-security-alert@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------ 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. [****** End SGI Advisory ******] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of SGI for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Center, 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. 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