Kdbg 1.1.0 through 1.2.8 does not check permissions of the .kdbgrc file, which allows local users to execute arbitrary commands.
http://www.redhat.com/support/errata/RHSA-2005-416.html
http://lists.kde.org/?l=kde-announce&m=106296509815092&w=2
http://lists.debian.org/debian-devel-changes/2003/09/msg00767.html