FreeBSD : gnutls -- MD5 downgrade in TLS signatures (3de36a19-429d-11e5-9daa-14dae9d210b8)

This script is Copyright (C) 2015 Tenable Network Security, Inc.

Synopsis :

The remote FreeBSD host is missing a security-related update.

Description :

Karthikeyan Bhargavan reports :

GnuTLS does not by default support MD5 signatures. Indeed the RSA-MD5
signature-hash algorithm needs to be explicitly enabled using the
priority option VERIFY_ALLOW_SIGN_RSA_MD5. In the NORMAL and SECURE
profiles, GnuTLS clients do not offer RSA-MD5 in the signature
algorithms extension. However, we find that all GnuTLS clients still
accept RSA-MD5 in the ServerKeyExchange and GnuTLS servers still
accept RSA-MD5 in the ClientCertificateVerify.

See also :

Solution :

Update the affected package.

Risk factor :


Family: FreeBSD Local Security Checks

Nessus Plugin ID: 85427 ()

Bugtraq ID:


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