Mandriva Linux Security Advisory MDKSA-2006-159 – Previous sudo updates were made available to sanitize certain environment variables from affecting a sudo call, such as PYTHONINSPECT, PERL5OPT, etc. While those updates were effective in addressing those specific environment variables, other variables that were not blacklisted were being made available.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/49699/MDKSA-2006-159.txt
Source: https://packetstormsecurity.com/files/49699/Mandriva-Linux-Security-Advisory-2006.159.html