nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI.
http://secunia.com/advisories/55825
http://secunia.com/advisories/55822
http://secunia.com/advisories/55757
http://mailman.nginx.org/pipermail/nginx-announce/2013/000125.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00119.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00118.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00084.html
http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00007.html