In Apache Subversion versions up to and including 1.9.10, 1.10.4, 1.12.0, Subversion's svnserve server process may exit when a client sends certain sequences of protocol commands. This can lead to disruption for users of the server. A flaw was found in subversion. A remote, unauthenticated user can cause a null-pointer-dereference in svnserve by sending a certain sequences of protocol commands to the server. This results in a denial of service in some server configurations, specifically when anonymous access is enabled. The highest threat from this vulnerability is to system availability.
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