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 :

http://permalink.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/8132
http://www.gnutls.org/security.html#GNUTLS-SA-2015-2
http://seclists.org/oss-sec/2015/q2/367
http://www.nessus.org/u?1dde2b56

Solution :

Update the affected package.

Risk factor :

High

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 85427 ()

Bugtraq ID:

CVE ID:

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now