Red Hat Network (RHN) Satellite Server 5.3 and 5.4 does not properly rewrite unspecified URLs, which allows remote attackers to (1) obtain unspecified sensitive host information or (2) use the server as an inadvertent proxy to connect to arbitrary services and IP addresses via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66691
https://bugzilla.redhat.com/show_bug.cgi?id=491365
http://www.vupen.com/english/advisories/2011/0967
http://www.securitytracker.com/id?1025316
http://www.securityfocus.com/bid/47316