An denial of service bug has been found in the way perl-Net-DNS expands compressed DNS results. It is possible to cause the application using perl-Net-DNS to consume resources and crash. http://rt.cpan.org/Public/Bug/Display.html?id=27285
Upstream fixed in version 0.60: http://search.cpan.org/src/OLAF/Net-DNS-0.60/Changes
This issue was addressed in: Red Hat Enterprise Linux: http://rhn.redhat.com/errata/RHSA-2007-0674.html Fedora: updated to fixed upstream version