Mandriva Linux Security Advisory 2009-042 – Samba 3.2.0 through 3.2.6, when registry shares are enabled, allows remote authenticated users to access the root filesystem via a crafted connection request that specifies a blank share name. This update provides samba 3.2.7 to address this issue.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75032/MDVSA-2009-042.txt
Source: https://packetstormsecurity.com/files/75032/Mandriva-Linux-Security-Advisory-2009-042.html