kdesu program in KDE2 (KDE before 2.2.0-6) does not properly verify the owner of a UNIX socket that is used to send a password, which allows local users to steal passwords and gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5995
http://www.novell.com/linux/security/advisories/2001_002_kdesu_txt.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-018.php3?dis=7.2
http://www.calderasystems.com/support/security/advisories/CSSA-2001-005.0.txt