Describe CVE-2007-3778.
What is CVE-2007-3778?
The G/PGP (GPG) Plugin 2.0, and 2.1dev before 20060912, for Squirrelmail allows remote attackers to execute arbitrary commands via shell metacharacters in the messageSignedText parameter to the gpg_check_sign_pgp_mime function in gpg_hook_functions.php.  NOTE: a parameter value can be set in the contents of an e-mail message..