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

High Nessus Plugin ID 85427


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


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.


Update the affected package.

See Also

Plugin Details

Severity: High

ID: 85427

File Name: freebsd_pkg_3de36a19429d11e59daa14dae9d210b8.nasl

Version: $Revision: 2.1 $

Type: local

Published: 2015/08/17

Modified: 2015/08/17

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:gnutls, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2015/08/14

Vulnerability Publication Date: 2015/04/25