Mandriva Linux Security Advisory 2009-077 – Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user’s non-ASCII username, via a login attempt. The updated packages have been patched to prevent this. Additionally some development packages were missing that are required to build pam for CS4, these are also provided with this update.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75981/MDVSA-2009-077.txt
Source: https://packetstormsecurity.com/files/75981/Mandriva-Linux-Security-Advisory-2009-077.html