To: bugtraqat_private announceat_private scoannmodat_private ______________________________________________________________________________ SCO Security Advisory Subject: OpenServer 5.0.5 OpenServer 5.0.6 : Buffer overflows and other security vulnerabilities in Squid Advisory number: CSSA-2003-SCO.9 Issue date: 2003 May 27 Cross reference: ______________________________________________________________________________ 1. Problem Description Vulnerability in Squid related to proxy authentication credentials may allow remote web sites to obtain the user's proxy login and password. FTP proxy in Squid does not compare the IP addresses of control and data connections with the FTP server, which allows remote attackers to bypass firewall rules or spoof FTP server responses. Buffer overflows in Squid allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code (1) via the MSNT auth helper (msnt_auth) when using denyusers or allowusers files, (2) via the gopher client, or (3) via the FTP server directory listing parser when HTML output is generated. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- OpenServer 5.0.5 Squid distribution OpenServer 5.0.6 Squid distribution 3. Solution The proper solution is to install the latest packages. 4. OpenServer 5.0.5 4.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.9 4.2 Verification MD5 (VOL.000.000) = a4abc782d87415df7369a0483e3b1554 MD5 (VOL.000.001) = d91c192ac5ec45fe609d5a58fdf736b5 MD5 (VOL.000.002) = af55795c6ebbe9012c9eb5d8b2f6e57a MD5 (VOL.000.003) = c5a74b7f6ab24a311b2fc24f01740ffe md5 is available for download from ftp://ftp.sco.com/pub/security/tools 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following sequence: 1) Download the VOL* files to the /tmp directory 2) Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 5. OpenServer 5.0.6 5.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.9 5.2 Verification MD5 (VOL.000.000) = a4abc782d87415df7369a0483e3b1554 MD5 (VOL.000.001) = d91c192ac5ec45fe609d5a58fdf736b5 MD5 (VOL.000.002) = af55795c6ebbe9012c9eb5d8b2f6e57a MD5 (VOL.000.003) = c5a74b7f6ab24a311b2fc24f01740ffe md5 is available for download from ftp://ftp.sco.com/pub/security/tools 5.3 Installing Fixed Binaries Upgrade the affected binaries with the following sequence: 1) Download the VOL* files to the /tmp directory 2) Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 6. References Specific references for this advisory: http://www.squid-cache.org/Advisories/SQUID-2002_3.txt http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0714 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0713 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0715 SCO security resources: http://www.sco.com/support/security/index.html This security fix closes SCO incidents sr866632, fz521515, erg501628. 7. Disclaimer SCO 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 SCO products. 8. Acknowledgements The Squid Team discovered and researched these vulnerabilities. ______________________________________________________________________________
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