GNUMail 1.1.2 and earlier does not properly use the --status-fd argument when invoking GnuPG, which prevents GNUMail from visually distinguishing between signed and unsigned portions of OpenPGP messages with multiple components, which allows remote attackers to forge the contents of a message without detection.
- http://www.coresecurity.com/?action=item&id=1687
No PoCs found on GitHub currently.