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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2000.102 -- SGI Security Advisory 20000501-01-P Vulnerability in infosrch.cgi 25 May 2000 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: infosrch.cgi Vendor: SGI Operating System: IRIX Platform: N/A Impact: Read-only Data Access Access Required: Remote - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title: Vulnerability in infosrch.cgi Number: 20000501-01-P Date: May 22, 2000 ______________________________________________________________________________ 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 --- - - ----------------------- The Infosearch(1) subsystem is used to search and browse virtually all SGI on-line documentation. The infosrch.cgi(1) is a program that allows access to infosearch(1) through a default installed HTTP web server on port 80. Unfortunately, a vulnerability has been discovered in infosrch.cgi(1) which could allow any remote user to view files on the vulnerable system with privileges of the user "nobody". 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 future releases of IRIX. - - -------------- - - --- Impact --- - - -------------- The infosrch.cgi(1) program is installed by default on IRIX. A local account is not required to exploit this vulnerability. This vulnerability can be utilized to view files on the local system with the user privileges of "nobody". This vulnerability has been publicly 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 disable the infosrch.cgi(1) program 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 infosrch.cgi(1) program. ================= **** WARNING **** ================= Removing the permissions from the infosrch.cgi(1) program will prevent non-root users from using the Infosearch subsystem through the HTTP web server. # /bin/chmod 500 /usr/lib/infosearch/bin/infosrch.cgi 3) Return to previous level. # exit % - - ---------------- - - --- Solution --- - - ---------------- OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x not tested Note 1 IRIX 4.x not tested Note 1 IRIX 5.X not tested Note 1 IRIX 6.0.x-6.1 not tested Note 1 IRIX 6.2 no Note 2 IRIX 6.3-6.4 not tested Note 1 IRIX 6.5-6.5.7 yes 6.5.8 Note 3 & 4 IRIX 6.5.8 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/irix/news/index.html#policy 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/irix/news/index.html#policy for more information. 3) See "Temporary Solution" section. 4) If you have not received the IRIX 6.5.8 CDs for IRIX 6.5, contact your SGI Support Provider or download the IRIX 6.5.8 Maintenance Release Stream from http://support.sgi.com/ or ftp://patches.sgi.com/support/relstream/ Patches are available via the web, anonymous FTP and from your SGI service/support provider. 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/ and ftp://patches.sgi.com/support/relstream/ IRIX Security Patchsets can be found at: http://www.sgi.com/Support/security/ and ftp://sgigate.sgi.com/patches/ 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 - - ------------------------ - - --- Acknowledgments ---- - - ------------------------ SGI wishes to thank the users of the Internet Community at large for their assistance in this matter. - - ----------------------------------------- - - --- SGI Security Information/Contacts --- - - ----------------------------------------- If there are questions about this document, email can be sent to cse-security-alert@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 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 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 <YourEmailAddress> end ^d In the example above, <YourEmailAddress> 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. - -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBOSmqILQ4cFApAP75AQFlwQP/QlexVYMYaGz9c4SBRrEIBE9JHL6beHwh lnqlKMRAyvbJIiwhbGLxWGoACjoWuROUJg1lIIpKD675N7HffiLsI2VCyBN398/I xY9mYxswSS/BU0QzzGLsLufO8A5In3o1WuYSl9qMf6Esu1begmLDYBbq28k+qfzY FduKBWWVui8= =eRBn - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOXXSrCh9+71yA2DNAQHZYQP/QmHlBpiwYcG/6ZTd+CxeJ4QwarD6hPAw +kB9M4FNUr8ZrmHVOWBlkWi6LdQP0PEyLxL+R7fcamXDQYfgctMbRr9u4Ivv30As q+wqOVQ7m5y5FJHKf38mFNi9nS90z8R86rGuaNrsqTU5h3YHimNkKgWvk+T3S5/a 8jsZ3RfrAaI= =sBVy -----END PGP SIGNATURE-----