Apache Httpd < 2.0.51 : WebDAV remote crash

An issue was discovered in the mod_dav module which could be triggered for a location where WebDAV authoring access has been configured. A malicious remote client which is authorized to use the LOCK method could force an httpd child process to crash by sending a particular sequence of LOCK requests. This issue does not allow execution of arbitrary code. and will only result in a denial of service where a threaded process model is in use.