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.
labs.idefense.com/intelligence/vulnerabilities/display.php?id=330
lists.immunitysec.com/pipermail/dailydave/2007-July/004452.html
lists.immunitysec.com/pipermail/dailydave/2007-July/004456.html
osvdb.org/37931
secunia.com/advisories/26035
www.attrition.org/pipermail/vim/2007-July/001704.html
www.attrition.org/pipermail/vim/2007-July/001710.html
www.securityfocus.com/bid/24874
www.vupen.com/english/advisories/2007/2513
exchange.xforce.ibmcloud.com/vulnerabilities/35363