A security flaw was found in the way Net-Server, an extensible, class oriented module written in Perl language and intended to be the back end layer of Internet protocol servers, performed access control allow / deny decisions, when the 'reverse_lookups' option was enabled (previously the incoming connection source IP has been checked only for presence of reverse DNS matching record for the given hostname, but did not check that the hostname actually resolved back to the provided source IP address). A remote attacker could use this flaw to confuse Net-Server's parser into accepting an invalid reverse DNS entry for particular source IP address of the connection, possibly leading to incorrect ACL decision to be issued later.
I am not sure there is an upstream patch for this issue yet. But once there is, please schedule updates for Fedora / Fedora-EPEL versions.
Created perl-Net-Server tracking bugs for this issue
Affects: fedora-all [bug 920684]
Affects: epel-all [bug 920685]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.