The default configuration of the Xsession file in Mandrake Linux 7.1 and 7.0 bypasses the Xauthority access control mechanism with an "xhost + localhost" command, which allows local users to sniff X Windows events and gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5305
http://www.securityfocus.com/bid/1735
http://www.securityfocus.com/archive/1/136495
http://www.linux-mandrake.com/en/security/MDKSA-2000-052.php3