Desktop Communication Protocol (DCOP) daemon, aka dcopserver, in KDE before 3.4 allows local users to cause a denial of service (dcopserver consumption) by "stalling the DCOP authentication process."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10432
http://www.securityfocus.com/bid/12820
http://www.securityfocus.com/archive/1/427976/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2005-325.html
http://www.redhat.com/support/errata/RHSA-2005-307.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:058
http://www.kde.org/info/security/advisory-20050316-1.txt