From agent99@sgi.com Wed Aug 29 02:24:18 2001 From: SGI Security Coordinator To: vulnwatch@vulnwatch.org Date: Tue, 28 Aug 2001 13:19:01 -0700 (PDT) Subject: [VulnWatch] IRIX File globbing vulnerability in ftpd [The following text is in the "iso-8859-1" character set] [Your display is set for the "US-ASCII" character set] [Some characters may be displayed incorrectly] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title: File globbing vulnerability in ftpd Number: 20010802-01-P Reference: CERTŪ Advisory CA-2001-07 Reference: CVE CAN-2001-0247 Date: August, 28 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 --- - ----------------------- NAI COVERT Labs reported a file globbing vulnerability in ftpd daemon 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 future releases of IRIX. - -------------- - --- Impact --- - -------------- The ftpd(1M) daemon is installed by default on IRIX. A local user account on the vulnerable system is not required in order to exploit ftpd daemon. The ftpd daemon can be exploited remotely over an untrusted network. The exploitable buffer overflow vulnerability can lead to a root compromise. NAI Covert Labs reported the ftp server vulnerability: http://www.pgp.com/research/covert/advisories/048.asp The ftpd vulnerability was also reported by CERTŪ Advisory CA-2001-07: http://www.cert.org/advisories/CA-2001-07.html This ftpd vulnerability was assigned the following CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0247 This ftpd 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 ftpd(1M) daemon to prevent exploitation of this vulnerability until patches can be installed. ================= **** WARNING **** ================= These steps will disable the ftp server. 1) Become the root user on the system. % /bin/su - Password: # 2) Edit the file /etc/inetd.conf and place a "#" as the first character of the ftp line to comment out and deactivate the service. # vi /etc/inetd.conf {Find the following line} ftp stream tcp nowait root /usr/etc/ftpd ftpd -l {Place a "#" as the first character of the ftp line} #ftp stream tcp nowait root /usr/etc/ftpd ftpd -l {Save the file and exit} 3) Force inetd to re-read the configuration file. # /etc/killall -HUP inetd 4) Kill any existing ftpd process. # /etc/killall ftpd 5) Return to previous level. # exit % - ---------------- - --- Solution --- - ---------------- 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 4270 Note 2 & 3 IRIX 6.5.1 yes 4270 Note 2 & 3 IRIX 6.5.2 yes 4270 Note 2 & 3 IRIX 6.5.3 yes 4270 Note 2 & 3 IRIX 6.5.4 yes 4270 Note 2 & 3 IRIX 6.5.5 yes 4270 Note 2 & 3 IRIX 6.5.6 yes 4270 Note 2 & 3 IRIX 6.5.7 yes 4270 Note 2 & 3 IRIX 6.5.8 yes 4270 Note 2 & 3 IRIX 6.5.9 yes 4270 Note 2 & 3 IRIX 6.5.10 yes 4270 Note 2 & 3 IRIX 6.5.11 yes 4270 Note 2 & 3 IRIX 6.5.12 yes 4270 Note 2 & 3 IRIX 6.5.13 no Note 4 & 5 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) Download the IRIX 6.5.13 Maintenance Release Stream from the URL: http://support.sgi.com/colls/patches/tools/relstream/index.html 5) 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/irix/swupdates/ 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.4270 Algorithm #1 (sum -r): 12497 8 README.patch.4270 Algorithm #2 (sum): 34418 8 README.patch.4270 MD5 checksum: EBF634B7F6C4B87F7E0178F26EAFEE5A Filename: patchSG0004270 Algorithm #1 (sum -r): 18303 4 patchSG0004270 Algorithm #2 (sum): 56841 4 patchSG0004270 MD5 checksum: 08A70D53F1FC81E4AB4B462394BF2CA1 Filename: patchSG0004270.eoe_sw Algorithm #1 (sum -r): 63206 117 patchSG0004270.eoe_sw Algorithm #2 (sum): 11262 117 patchSG0004270.eoe_sw MD5 checksum: 8F359DA297E29553FA0D281BA1FB1110 Filename: patchSG0004270.idb Algorithm #1 (sum -r): 59260 1 patchSG0004270.idb Algorithm #2 (sum): 33639 1 patchSG0004270.idb MD5 checksum: 6CBBF5B738604C469A017C881646071D - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank the NAI COVERT Labs, CERT Coordination Center and 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 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 gerneral 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 iQCVAwUBO4v4PbQ4cFApAP75AQFOYAQAqPUyWzVzClVvdisr9Xl0Rx7BHEwiH0t+ omdu5AeayeE0/qMPKbxTrTowjFGtc4dqyPxOPg5wMi0lgc4t6Ga8YIUg/Fr9B+T5 Mo4JWap7V3sCGafoAhIs2HsRk7kbfjLIAjc4MtmQw6S5nYByMmpRfEJMFtktGLx0 ruQNTCTfBCk= =uEbG -----END PGP SIGNATURE-----