IBM General Parallel File System (GPFS) 3.4 before 3.4.0.32, 3.5 before 3.5.0.24, and 4.1 before 4.1.0.7 in certain cipherList configurations allows remote attackers to bypass authentication and execute arbitrary programs as root via unspecified vectors.
http://www.securitytracker.com/id/1032880
http://www.securityfocus.com/bid/73278