An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because an X509_check_host negative error code is interpreted as a successful return value.
https://github.com/adrienverge/openfortivpn/issues/536
https://github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6f4c4
https://github.com/adrienverge/openfortivpn/commit/60660e00b80bad0fadcf39aee86f6f8756c94f91
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html