To: bugtraqat_private announceat_private scoannmodat_private ______________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: OpenServer 5.0.6a : squid compressed DNS answer message boundary failure Advisory number: CSSA-2002-SCO.26 Issue date: 2002 June 13 Cross reference: ______________________________________________________________________________ 1. Problem Description From Squid advisory SQUID-2002:2 : Error and boundary conditions were not checked when handling compressed DNS answer messages in the internal DNS code (lib/rfc1035.c). A malicious DNS server could craft a DNS reply that would cause Squid to exit with a SIGSEGV. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- OpenServer 5.0.6a /opt/K/SCO/Squid/2.4.6/* 3. Solution The proper solution is to install the latest packages. 4. OpenServer 5.0.6a 4.1 Location of Fixed Binaries ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.26 4.2 Verification MD5 (VOL.000.000) = 87accd0ac60bf509b86e66bb74062168 MD5 (VOL.000.001) = 4f709bb2f81fbb72e46f9f3608bca6e6 MD5 (VOL.000.002) = eb7964ff9190da6749341170ce779b12 MD5 (VOL.000.003) = 8be5cc4f62eb83d65541c491cbaaad3c md5 is available for download from ftp://ftp.caldera.com/pub/security/tools 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: 1) Download the VOL* files to the /tmp directory Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 5. References Specific references for this advisory: http://www.squid-cache.org/Advisories/SQUID-2002_2.txt Caldera security resources: http://www.caldera.com/support/security/index.html This security fix closes Caldera incidents sr862189, fz520428, erg712012. 6. Disclaimer Caldera International, Inc. is not responsible for the misuse of any of the information we provide on this website and/or through our security advisories. Our advisories are a service to our customers intended to promote secure installation and use of Caldera products. 7. Acknowledgements This vulnerability was discovered and researched by zen-parse <zen-parseat_private>. ______________________________________________________________________________
This archive was generated by hypermail 2b30 : Fri Jun 14 2002 - 05:48:56 PDT