Debian Linux Security Advisory 1981-1 – Christoph Anton Mitterer discovered that maildrop, a mail delivery agent with filtering abilities, is prone to a privilege escalation issue that grants a user root group privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85751/dsa-1981-1.txt
Source: https://packetstormsecurity.com/files/85751/Debian-Linux-Security-Advisory-1981-1.html