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Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : puppet vulnerability (USN-1238-1)

low Nessus Plugin ID 56630

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Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

It was discovered that Puppet incorrectly handled the non-default 'certdnsnames' option when generating certificates. If this setting was added to puppet.conf, the puppet master's DNS alt names were added to the X.509 Subject Alternative Name field of all certificates, not just the puppet master's certificate. An attacker that has an incorrect agent certificate in his possession can use it to impersonate the puppet master in a man-in-the-middle attack.

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 puppet-common package.

See Also

https://usn.ubuntu.com/1238-1/

Plugin Details

Severity: Low

ID: 56630

File Name: ubuntu_USN-1238-1.nasl

Version: 1.8

Type: Local

Agent: unix

Published: 10/25/2011

Updated: 9/19/2019

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:10.04:-:lts, cpe:/o:canonical:ubuntu_linux:10.10, cpe:/o:canonical:ubuntu_linux:11.04, cpe:/o:canonical:ubuntu_linux:11.10, p-cpe:/a:canonical:ubuntu_linux:puppet-common

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

Patch Publication Date: 10/24/2011

Vulnerability Publication Date: 10/27/2011

Reference Information

CVE: CVE-2011-3872

USN: 1238-1