Squid Improper Input Validation Vulnerability - CVE-2013-1839
The strHdrAcptLangGetItem function in errorpage.cc in Squid 3.2.x before 3.2.9 and 3.3.x before 3.3.3 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a quotquot character in an Accept-Language header.