"OpenVPN v2.4.2 was analyzed closely using a fuzzer by Guido Vranken. In the process several vulnerabilities were found, some of which are remotely exploitable in certain circumstances. We recommend you to upgrade to OpenVPN 2.4.3 or 2.3.17 as soon as possible. More details are available in our official security announcement.
"[OpenVPN v2.3.17] is a minor release that mostly fixes the security issues mentioned in our official security announcement."