FreeBSD : gnutls -- certificate chain verification DoS (84ab58cf-e4ac-11d8-9b0a-000347a4fa7d)

This script is Copyright (C) 2009-2015 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

Patric Hornik reports on a problem in the certificate chain
verification procedures of GnuTLS that may result in a
denial-of-service vulnerability :

The certificate chain should be verified from last root certificate to
the first certificate. Otherwise a lot of unauthorized CPU processing
can be forced to check certificate signatures signed with arbitrary
RSA/DSA keys chosen by attacker.

In GnuTLS the signatures are checked from first to last certificate,
there is no limit on size of keys and no limit on length of
certificate chain.

See also :

http://www.hornik.sk/SA/SA-20040802.txt
http://www.nessus.org/u?439a829d

Solution :

Update the affected packages.

Risk factor :

High

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 37047 (freebsd_pkg_84ab58cfe4ac11d89b0a000347a4fa7d.nasl)

Bugtraq ID:

CVE ID:

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