Mandriva Linux Security Advisory 2010-052 – sudo 1.6.x before 1.6.9p21, when the runas_default option is used, does not properly set group memberships, which allows local users to gain privileges via a sudo command. The updated packages have been patched to correct this issue.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/86801/MDVSA-2010-052.txt
Source: https://packetstormsecurity.com/files/86801/Mandriva-Linux-Security-Advisory-2010-052.html