The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allows local users to cause a denial of service (CPU consumption) via a large number of method calls.
https://bugs.freedesktop.org/show_bug.cgi?id=81053
http://www.ubuntu.com/usn/USN-2352-1
http://www.securitytracker.com/id/1030864
http://www.openwall.com/lists/oss-security/2014/09/16/9
http://www.mandriva.com/security/advisories?name=MDVSA-2015:176
http://www.debian.org/security/2014/dsa-3026
http://secunia.com/advisories/61431
http://secunia.com/advisories/61378
http://lists.opensuse.org/opensuse-updates/2014-09/msg00049.html
http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00026.html