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.A server-side memory leak was found in the Subversion server. If amalicious, remote user performed "svn blame" or "svn log" operations oncertain repository files, it could cause the Subversion server to consumea large amount of system memory. (CVE-2010-4644)A NULL pointer dereference flaw was found in the way the mod_dav_svn module(for use with the Apache HTTP Server) processed certain requests. If amalicious, remote user issued a certain type of request to display acollection of Subversion repositories on a host that has theSVNListParentPath directive enabled, it could cause the httpd processserving the request to crash. Note that SVNListParentPath is not enabled bydefault. (CVE-2010-4539)All Subversion users should upgrade to these updated packages, whichcontain backported patches to correct these issues. After installing theupdated packages, the Subversion server must be restarted for the updateto take effect: restart httpd if you are using mod_dav_svn, or restartsvnserve if it is used.