The ReadData function in ebmlmaster.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (assert fault) via a crafted mkv file.Referenceshttp://packetstormsecurity.com/files/144902/mkvalidator-0.5.1-Denial-Of-Service.htmlhttp://seclists.org/fulldisclosure/2017/Nov/19https://github.com/Matroska-Org/foundation-source/issues/24
