In May/June 2017 Guido Vranken threw a fuzzer at OpenVPN 2.4.2. In
the process he found several vulnerabilities and reported them to
the OpenVPN project. [...] The first releases to have these fixes are OpenVPN 2.4.3 and 2.3.17.
This is a list of fixed important vulnerabilities:
- Remotely-triggerable ASSERT() on malformed IPv6 packet
- Pre-authentication remote crash/information disclosure for clients
- Potential double-free in --x509-alt-username
- Remote-triggerable memory leaks
- Post-authentication remote DoS when using the --x509-track option
- Null-pointer dereference in establish_http_proxy_passthru()