The parse function in Email::Address module before 1.905 for Perl uses an inefficient regular expression, which allows remote attackers to cause a denial of service (CPU consumption) via an empty quoted string in an RFC 2822 address.
https://metacpan.org/release/RJBS/Email-Address-1.905
https://github.com/rjbs/Email-Address/blob/master/Changes
https://bugzilla.redhat.com/show_bug.cgi?id=1110723
http://www.debian.org/security/2014/dsa-2969
http://secunia.com/advisories/61981
http://secunia.com/advisories/59333