Subversion (SVN) is a concurrent version control system which enables oneor more users to collaborate in developing and maintaining a hierarchy offiles and directories while keeping a history of all changes. Themod_dav_svn module is used with the Apache HTTP Server to allow access toSubversion repositories via HTTP.A NULL pointer dereference flaw was found in the way the mod_dav_svn moduleprocessed requests submitted against the URL of a baselined resource. Amalicious, remote user could use this flaw to cause the httpd processserving the request to crash. (CVE-2011-1752)Red Hat would like to thank the Apache Subversion project for reportingthis issue. Upstream acknowledges Joe Schaefer of the Apache SoftwareFoundation as the original reporter.All Subversion users should upgrade to these updated packages, whichcontain a backported patch to correct this issue. After installing theupdated packages, you must restart the httpd daemon, if you are usingmod_dav_svn, for the update to take effect.