Kolab stores OpenLDAP passwords in plaintext in the slapd.conf file, which may be installed world-readable, which allows local users to gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16068
http://www.securityfocus.com/bid/10277
http://www.mandriva.com/security/advisories?name=MDKSA-2004:052
http://www.erfrakon.de/projects/kolab/download/kolab-server-1.0/src/Changelog