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

Low Nessus Plugin ID 56630


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


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.


Update the affected puppet-common package.

Plugin Details

Severity: Low

ID: 56630

File Name: ubuntu_USN-1238-1.nasl

Version: $Revision: 1.5 $

Type: local

Agent: unix

Published: 2011/10/25

Modified: 2016/05/26

Dependencies: 12634

Risk Information

Risk Factor: Low


Base Score: 2.6

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:puppet-common, 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

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

Patch Publication Date: 2011/10/24

Reference Information

CVE: CVE-2011-3872

OSVDB: 76623

USN: 1238-1