View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2011-4096 medium priority: Ubuntu including 1 source packages (squid3), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 4, not-affected 2.
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.