Secunia Security Advisory – A weakness has been reported in IBM Rational ClearQuest, which can be exploited by malicious people to identify valid user accounts.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/64319/sa29280.txt
Source: https://packetstormsecurity.com/files/64319/Secunia-Security-Advisory-29280.html