Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a stack exhaustion vulnerability. An authenticated remote attacker can crash the HTTP server via recursive parsing of JSON.Referenceshttps://www.tenable.com/security/research/tra-2018-21https://mikrotik.com/download/changelogshttps://mikrotik.com/download/changelogs/bugfix-release-treehttp://seclists.org/fulldisclosure/2019/Jul/20