HTTPSocket.cpp in the C++ Sockets Library before 2.2.5 allows remote attackers to cause a denial of service (crash) via an HTTP request with a missing protocol version number, which triggers an exception. NOTE: some of these details were obtained from third party information.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38309
http://www.securityfocus.com/bid/26361
http://www.alhem.net/Sockets/Changelog