The get_parent_resource function in repos.c in mod_dav_svn Apache HTTPD server module in Subversion 1.7.11 through 1.7.13 and 1.8.1 through 1.8.4, when built with assertions enabled and SVNAutoversioning is enabled, allows remote attackers to cause a denial of service (assertion failure and Apache process abort) via a non-canonical URL in a request, as demonstrated using a trailing /.
https://github.com/apache/subversion/commit/647e3f8365a74831bb915f63793b63e31fae062d
https://github.com/apache/subversion/commit/2c77c43e4255555f3b79f761f0d141393a3856cc
https://bugzilla.redhat.com/show_bug.cgi?id=1033431
http://subversion.apache.org/security/CVE-2013-4558-advisory.txt
http://lists.opensuse.org/opensuse-updates/2013-12/msg00048.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00029.html