A security issue has been found in OpenVPN <= 2.4.1 where an unauthenticated attacker can send a packet with an unexpected payload size during SSL handshake, causing a server shutdown. Servers using tls-auth are protected against this attack as packets with an invalid HMAC are discarded before being processed by the vulnerable code.
A security issue has been found in OpenVPN <= 2.4.1 where an unauthenticated attacker can send a packet with an unexpected payload size during SSL handshake, causing a server shutdown. Servers using tls-auth are protected against this attack as packets with an invalid HMAC are discarded before being processed by the vulnerable code.
https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits https://ostif.org/the-openvpn-2-4-0-audit-by-ostif-and-quarkslab-results/ http://blog.quarkslab.com/security-assessment-of-openvpn.html
Vulmon