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

high Nessus Plugin ID 33254

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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

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

See Also

https://usn.ubuntu.com/612-11/

Plugin Details

Severity: High

ID: 33254

File Name: ubuntu_USN-612-11.nasl

Version: 1.13

Type: local

Agent: unix

Published: 6/24/2008

Updated: 1/19/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:7.04, p-cpe:/a:canonical:ubuntu_linux:openssl-blacklist-extra, cpe:/o:canonical:ubuntu_linux:7.10, cpe:/o:canonical:ubuntu_linux:6.06:-:lts, p-cpe:/a:canonical:ubuntu_linux:openssl-blacklist, cpe:/o:canonical:ubuntu_linux:8.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 6/18/2008

Reference Information

USN: 612-11