Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : openssl-blacklist update (USN-612-11)

Ubuntu Security Notice (C) 2008-2013 Canonical, Inc. / NASL script (C) 2008-2013 Tenable Network Security, Inc.

Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

USN-612-3 addressed a weakness in OpenSSL certificate and key
generation and introduced openssl-blacklist to aid in detecting
vulnerable certificates and keys. This update adds RSA-4096 blacklists
to the openssl-blacklist-extra package and adjusts openssl-vulnkey to
properly handle RSA-4096 and higher moduli.

A weakness has been discovered in the random number generator used by
OpenSSL on Debian and Ubuntu systems. As a result of this weakness,
certain encryption keys are much more common than they should be, such
that an attacker could guess the key through a brute-force attack
given minimal knowledge of the system. This particularly affects the
use of encryption keys in OpenSSH, OpenVPN and SSL certificates.

Solution :

Update the affected openssl-blacklist and / or openssl-blacklist-extra

Risk factor :


Family: Ubuntu Local Security Checks

Nessus Plugin ID: 33254 ()

Bugtraq ID: