Secunia Security Advisory – Ubuntu has issued an update for tk. This fixes a vulnerability, which can potentially be exploited by malicious people to compromise an application using the library.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60059/sa27207.txt
Source: https://packetstormsecurity.com/files/60059/Secunia-Security-Advisory-27207.html