Secunia Security Advisory – Ubuntu has acknowledged a vulnerability in tcp-wrappers, 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/58966/sa26567.txt
Source: https://packetstormsecurity.com/files/58966/Secunia-Security-Advisory-26567.html