No flaws found in OpenVPN software. Our response to the CVE-2019-14899 vulnerability report.

I am getting the error “digest_error: NONE: not usable”

FAQ

This can occur if you specify auth none and also tls-auth in your client profile. This occurs because tls-auth needs an auth digest, but none was specified. There's a straightforward fix: just remove the tls-auth directive, since it can't be enabled anyway unless you have a non-none auth directive.

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