__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN 'arshell' Vulnerability in 'arrayd' [SGI Security Advisory Number 20050701-01-P] July 12, 2005 18:00 GMT Number P-244 ______________________________________________________________________________ PROBLEM: A vulnerability was discovered in arshell. ‘arshell’ is a variation of the standard rsh(1C) command for clusters of computers. It connects to a specified host in a cluster and provides a command shell. PLATFORM: SGI ProPack 3 with Service Pack 5 and 6 SGI ProPack 4 DAMAGE: The arshell command in the Array Service package in SGI ProPack contains a vulnerability which allows any user to start a shell as root on any host in the configured cluster or array. SOLUTION: Apply the security updates. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A local user may gain root privileges on ASSESSMENT: any system in the cluster or array. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-244.shtml ORIGINAL BULLETIN: ftp://patches.sgi.com/support/free/security/advisories/ 20050701-01-P.asc CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2005-1859 ______________________________________________________________________________ [***** Start SGI Security Advisory Number 20050701-01-P *****] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title: arshell vulnerability in arrayd Number: 20050701-01-P Date: July 1, 2005 Reference: SGI BUG 937936, CVE CAN-2005-1859 Fixed in: Patches 10181, 10182 and 10185 ______________________________________________________________________________ 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 reserves the right to change or update this Security Advisory without notice. 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 --- - ----------------------- While investigating arrayd, a vulnerability in arshell was found internally affecting SGI ProPack 3 with Service Pack 5 and 6, and SGI ProPack 4. The vulnerability can lead to a root compromise. SGI has assigned CVE CAN-2005-1859 to this issue: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1859 The vulnerability in arshell was introduced in SGI ProPack 3 with Service Pack 5 and above. Older Service Packs of SGI ProPack 3 and SGI IRIX are not vulnerable. SGI has investigated the issue and recommends the following steps for resolving this issue. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. - -------------- - --- Impact --- - -------------- SGI bug 937936 was filed to track this issue: The arshell command in the Array Service package in SGI ProPack contains an exploit which allows any user to start a shell as root on any host in the configured cluster or array. This patch prevents users from changing from non-root to root when using the arshell command. SGI IRIX is not vulnerable. SGI ProPack 3 with Service Pack 5 and above is vulnerable. - - - ---------------- - --- Solution --- - ---------------- SGI has provided a series of patches for these vulnerabilities and recommends that all affected operating systems install the appropriate patch. OS Version Vulnerable? Patch # Other Actions - ---------- ----------- ------- ------------- SGI IRIX no SGI ProPack 3 no SGI ProPack 3 SP 1 no SGI ProPack 3 SP 2 no SGI ProPack 3 SP 3 no SGI ProPack 3 SP 4 no SGI ProPack 3 SP 5 yes 10181 SGI ProPack 3 SP 6 yes 10185 SGI ProPack 4 yes 10182 Patches for SGI ProPack can be obtained from http://support.sgi.com/ - ------------- - --- Links --- - ------------- 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/ 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/ 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/ 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 (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. - ----------------------------------------- - --- 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 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 iQCVAwUBQsWqqbQ4cFApAP75AQGhnAP/U+20PFd71kosWF/shwKV3tM9aLpuZ/Ba xT7lE69s+EDwhEwJB5i3HeCgXtbeAkEGON62z93Gor+jPRC6s1p6UAMg4DISME8W xObUnP0Qqcf14SvWC45oWYux3U8A/nXpZ9votri72UuT+t3KVAdm3rgpmSY0L6td wIwZKKUCGtA= =z2NE -----END PGP SIGNATURE----- [***** End SGI Security Advisory Number 20050701-01-P *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of 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. 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