Secunia Security Advisory – Debian has issued an update for mason. This fixes a security issue, which can be exploited by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40471/sa17084.txt
Source: https://packetstormsecurity.com/files/40471/Secunia-Security-Advisory-17084.html