Secunia Security Advisory – Red Hat has issued an update for tk. This fixes some vulnerabilities, which can 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/63931/sa29069.txt
Source: https://packetstormsecurity.com/files/63931/Secunia-Security-Advisory-29069.html