Websense Enterprise 6.3.1 allows remote attackers to bypass content filtering by visiting http URLs with a (1) RealPlayer G2, (2) MSMSGS, or (3) StoneHttpAgent User-Agent header, which results in a Non-HTTP categorization.
lists.grok.org.uk/pipermail/full-disclosure/2007-December/059092.html
mrhinkydink.blogspot.com/2007/12/websense-policy-filtering-bypass.html
secunia.com/advisories/28026
www.securityfocus.com/archive/1/485032/100/0/threaded
www.securityfocus.com/archive/1/485033/100/0/threaded
www.securitytracker.com/id?1019094
www.vupen.com/english/advisories/2007/4210
www.websense.com/SupportPortal/SupportKbs/976.aspx
exchange.xforce.ibmcloud.com/vulnerabilities/39023