A flaw was found in the way RHN Satellite rewrote certain URLs.
An unauthenticated user could use a specially-crafted HTTP
request to obtain sensitive information about the host system
RHN Satellite was running on. They could also use RHN Satellite
as a distributed denial of service tool, forcing it to connect
to an arbitrary service at an arbitrary IP address via a
specially-crafted HTTP request.
This issue has been addressed in following products:
Red Hat Network Satellite Server v 5.3
Red Hat Network Satellite Server v 5.4
Via RHSA-2011:0434 https://rhn.redhat.com/errata/RHSA-2011-0434.html