(mod_dav_svn): File contents disclosure of files configured to be unreadable by those users

The moddavsvn module for the Apache HTTP Server, as distributed in Apache Subversion 1.5.x and 1.6.x before 1.6.17, when the SVNPathAuthz shortcircuit option is disabled, does not properly enforce permissions for files that had been publicly readable in the past, which allows remote attackers to...