(mod_dav_svn): DoS (excessive memory use) when large number of properties are set or deleted

The moddavsvn Apache HTTPD server module in Subversion 1.6.x before 1.6.21 and 1.7.0 through 1.7.8 allows remote authenticated users to cause a denial of service memory consumption by 1 setting or 2 deleting a large number of properties for a file or directory...