A vulnerability has been found and corrected in libuser:

libuser before 0.57 uses a cleartext password value of (1) !! or (2) x
for new LDAP user accounts, which makes it easier for remote attackers
to obtain access by specifying one of these values (CVE-2011-0002).

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&products_id=490

The updated packages have been patched to correct this issue.