Secunia Security Advisory – A vulnerability has been reported in mod_auth_shadow, which can potentially by exploited by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/88704/sa39502.txt
Source: https://packetstormsecurity.com/files/88704/Secunia-Security-Advisory-39502.html