Related Vulnerabilities: CVE-2017-7522  

A post-authentication remote DoS has been found in OpenVPN >= 2.4 and < 2.4.3, allowing a client to crash a server by sending a crafted certificate with an embedded NUL character. The issue requires the OpenVPN server to be built against mbedtls and to use the --x509-track option.

Severity Medium

Remote Yes

Type Denial of service

Description

A post-authentication remote DoS has been found in OpenVPN >= 2.4 and < 2.4.3, allowing a client to crash a server by sending a crafted certificate with an embedded NUL character.  The issue requires the OpenVPN server to be built against mbedtls and to use the --x509-track option.

AVG-319 openvpn 2.4.2-1 2.4.3-1 Medium Not affected

https://github.com/OpenVPN/openvpn/commit/426392940c