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.

img.pl in Barracuda Spam Firewall running firmware 3.1.16 and 3.1.17 allows remote attackers to execute arbitrary commands via shell metacharacters in the f parameter.

Directory traversal vulnerability in img.pl in Barracuda Spam Firewall running firmware 3.1.16 and 3.1.17 allows remote attackers to read arbitrary files via a .. (dot dot) in the f parameter.

Argument injection vulnerability in Barracuda Spam Firewall running firmware 3.1.16 and 3.1.17 allows remote attackers to (1) read portions of source code via the -f option to Dig (dig_device.cgi), (2) determine file existence via the -r argument to Tcpdump (tcpdump_device.cgi) or (3) modify files in the cgi-bin directory via the -w argument to Tcpdump.