Apache 1.4.x before 1.3.30, and 2.0.x before 2.0.49, when using multiple listening sockets on certain platforms, allows remote attackers to cause a denial of service (blocked new connections) via a "short-lived connection on a rarely-accessed listening socket."
https://exchange.xforce.ibmcloud.com/vulnerabilities/15540
http://www.mandriva.com/security/advisories?name=MDKSA-2004:046