Ubuntu Security Notice 389-1 – A buffer overflow was discovered in GnuPG. By tricking a user into running gpg interactively on a specially crafted message, an attacker could execute arbitrary code with the user’s privileges. This vulnerability is not exposed when running gpg in batch mode.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/52710/USN-389-1.txt
Source: https://packetstormsecurity.com/files/52710/Ubuntu-Security-Notice-389-1.html