Unspecified vulnerability in the Secure Shell (SSH) in HP Tru64 UNIX 5.1B-4 and 5.1B-3 allows remote attackers to identify valid users via unspecified vectors, probably related to timing attacks and AuthInteractiveFailureRandomTimeout.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34329
http://www.vupen.com/english/advisories/2007/1851
http://www.securitytracker.com/id?1018065
http://www.securityfocus.com/bid/24021
http://secunia.com/advisories/24036
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01007552