The sslConnectTimeout function in ssl.c for Squid 2.5.STABLE10 and earlier allows remote attackers to cause a denial of service (segmentation fault) via certain crafted requests.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10522
http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE10-sslConnectTimeout
http://www.securityfocus.com/bid/14731
http://www.redhat.com/support/errata/RHSA-2005-766.html
http://www.novell.com/linux/security/advisories/2005_53_squid.html
http://www.novell.com/linux/security/advisories/2005_21_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:162
http://www.gentoo.org/security/en/glsa/glsa-200509-06.xml
http://www.debian.org/security/2005/dsa-809
http://securitytracker.com/id?1014846
http://secunia.com/advisories/17027