A vulnerability has been found and corrected in xrdb:

xrdb.c in xrdb before 1.0.9 in X.Org X11R7.6 and earlier allows remote
attackers to execute arbitrary commands via shell metacharacters in a
hostname obtained from a (1) DHCP or (2) XDMCP message (CVE-2011-0465).

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.