Debian Security Advisory 1531-1 – Chris Howells discovered that policyd-weight, a policy daemon for the Postfix mail transport agent, created its socket in an insecure way, which may be exploited to overwrite or remove arbitrary files from the local system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/64953/dsa-1531-1.txt
Source: https://packetstormsecurity.com/files/64953/Debian-Linux-Security-Advisory-1531-1.html