query.py in the query interface in ViewVC before 1.1.3 does not reject configurations that specify an unsupported authorizer for a root, which might allow remote attackers to bypass intended access restrictions via a query.
lists.opensuse.org/opensuse-security-announce/2010-01/msg00009.html
viewvc.tigris.org/source/browse/viewvc/trunk/CHANGES?r1=2242&r2=2313&pathrev=HEAD
viewvc.tigris.org/source/browse/viewvc?view=rev&revision=2300
www.openwall.com/lists/oss-security/2010/01/11/2
www.openwall.com/lists/oss-security/2010/01/13/5
www.redhat.com/archives/fedora-package-announce/2009-December/msg01421.html
www.redhat.com/archives/fedora-package-announce/2009-December/msg01464.html