Apache Traffic Server 2.0.x and 3.0.x before 3.0.4 and 3.1.x before 3.1.3 does not properly allocate heap memory, which allows remote attackers to cause a denial of service (daemon crash) via a long HTTP Host header.
https://www.cert.fi/en/reports/2012/vulnerability612884.html
http://www.securitytracker.com/id?1026847
http://www.securityfocus.com/bid/52696
http://trafficserver.apache.org/downloads
http://seclists.org/fulldisclosure/2012/Mar/260
http://archives.neohapsis.com/archives/bugtraq/2012-03/0118.html