From agent99@sgi.com Wed Mar 19 17:34:15 2003 From: SGI Security Coordinator To: agent99@sgi.com Newsgroups: comp.sys.sgi.announce, comp.security.unix, comp.sys.sgi.admin, comp.security.announce Date: Wed, 19 Mar 2003 12:28:08 -0800 Subject: SMB/CIFS Security Vulnerability in Samba on IRIX -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory Title : SMB/CIFS Security Vulnerability in Samba Number : 20030302-01-I Date : March 19, 2003 Reference: CVE CAN-2003-0085 Reference: CVE CAN-2003-0086 Reference: SGI BUGS 883509 884044 Fixed in : Samba version 2.2.8 ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- It's been reported that there is a SMB/CIFS packet fragment re-assembly code vulnerability in versions of Samba prior to version 2.2.8. A successful exploit of this vulnerability could allow an external attacker to remotely and anonymously gain root privilege on a system running the Samba server. See http://us1.samba.org/samba/whatsnew/samba-2.2.8.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0085 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0086 for more details. SGI has investigated the issues 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 Samba version 2.2.8. - -------------- - --- Impact --- - -------------- Samba is an optional product and is not installed by default on IRIX 6.5 systems. 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 6.5.16f 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. To see if Samba is installed, execute the following command: % versions samba_irix I = Installed, R = Removed Name Date Description I samba_irix 07/02/2002 Samba 2.2.4 for IRIX I samba_irix.man 07/02/2002 Samba Online Documentation I samba_irix.man.doc 07/02/2002 Samba 2.2.4 Documentation I samba_irix.man.manpages 07/02/2002 Samba 2.2.4 Man Page I samba_irix.man.relnotes 07/02/2002 Samba 2.2.4 Release Notes I samba_irix.src 07/02/2002 Samba Source Code I samba_irix.src.samba 07/02/2002 Samba 2.2.4 Source Code I samba_irix.sw 07/02/2002 Samba Execution Environment I samba_irix.sw.base 07/02/2002 Samba 2.2.4 Execution Environment If the result is similar to the above and the version shown is less than 2.2.8, then the system is vulnerable. - ---------------------------- - --- Temporary Workaround --- - ---------------------------- Though it is possible to limit exposure by filtering what IPs can talk to your Samba server, there is no effective workaround to fully address these problems. SGI recommends upgrading to Samba version 2.2.8. - ---------------- - --- Solution --- - ---------------- SGI has provided an instable version of Samba for this vulnerability. Our recommendation is to upgrade to Samba version 2.2.8. The free unsupported Samba 2.2.8 version can be currently downloaded from the following websites: http://freeware.sgi.com/beta/fw_samba-2.2.8.tardist http://master.samba.org/samba/ftp/Binary_Packages/IRIX/ For customers who have purchased the SGI supported version of Samba called samba_irix, please contact your SGI Support Representative and request CD part number 812-0893-010 -- Samba 2.2.8 for IRIX on CD. - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank the Sebastian Krahmer, the SuSE security team, the Samba Group 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/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. - ----------------------------------------- - --- 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 iQCVAwUBPnjRVbQ4cFApAP75AQEOYAP+JXQz1lctJ+e+qw79i/Xq/yYDXbO0QiF8 rPRiMiRBdzdM6AftmrafxtYlZBA6zAIpOKREdXmIqX0ugCRynwGke0EiC/p5IfLi GMZoztzO78zk03n4rrAbWqFCBoxzcJOEo9dnuFVIxosx1zJB2LpXrfytZieLJpLh t1m/MAoQn18= =wxEX -----END PGP SIGNATURE-----