Open vSwitch 1.4.2 uses world writable permissions for (1) /var/lib/openvswitch/pki/controllerca/incoming/ and (2) /var/lib/openvswitch/pki/switchca/incoming/, which allows local users to delete and overwrite arbitrary files.
https://exchange.xforce.ibmcloud.com/vulnerabilities/77417
https://bugzilla.redhat.com/show_bug.cgi?id=845350
http://www.securityfocus.com/bid/54794
http://www.securityfocus.com/bid/54789
http://www.openwall.com/lists/oss-security/2012/08/03/6