CVE-2011-4096
The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.
Date published : 2011-11-17
http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:193