surf: cookie jar has read access from other local user
https://security-tracker.debian.org/tracker/CVE-2012-0842
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-0842
http://www.openwall.com/lists/oss-security/2012/02/11/3
http://www.openwall.com/lists/oss-security/2012/02/10/9