Buffer overflows in Squid before 2.4.STABLE6 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.
http://www.squid-cache.org/Versions/v2/2.4/bugs/
http://www.squid-cache.org/Advisories/SQUID-2002_3.txt
http://www.securityfocus.com/bid/5157
http://www.securityfocus.com/bid/5156
http://www.securityfocus.com/bid/5155
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-044.php
http://www.iss.net/security_center/static/9482.php
http://www.iss.net/security_center/static/9481.php
http://www.iss.net/security_center/static/9480.php
http://rhn.redhat.com/errata/RHSA-2002-130.html