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://lists.kde.org/?l=kde-announce&m=106296509815092&w=2
it's now fixed in kdbg-1.2.1-7, built it in 2.1AS-errata-candidate tree
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2005-416.html