Barracuda Spam Firewall 3.1.10 and earlier does not restrict the domains that white-listed domains can send mail to, which allows members of white-listed domains to use Barracuda as an open mail relay for spam.Referenceshttp://secunia.com/advisories/14243https://exchange.xforce.ibmcloud.com/vulnerabilities/19283http://marc.info/?l=bugtraq&m=110805534732492&w=2
