National Cyber Awareness System

Vulnerability Summary for CVE-2011-3872

Overview

Puppet 2.6.x before 2.6.12 and 2.7.x before 2.7.6, and Puppet Enterprise (PE) Users 1.0, 1.1, and 1.2 before 1.2.4, when signing an agent certificate, adds the Puppet master's certdnsnames values to the X.509 Subject Alternative Name field of the certificate, which allows remote attackers to spoof a Puppet master via a man-in-the-middle (MITM) attack against an agent that uses an alternate DNS name for the master, aka "AltNames Vulnerability."

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1

Type: Patch Information

Hyperlink:http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1

External Source: XF

Name: puppet-x509-spoofing(70970)

Hyperlink:http://xforce.iss.net/xforce/xfdb/70970

External Source: UBUNTU

Name: USN-1238-2

Hyperlink:http://www.ubuntu.com/usn/USN-1238-2

External Source: UBUNTU

Name: USN-1238-1

Hyperlink:http://www.ubuntu.com/usn/USN-1238-1

External Source: BID

Name: 50356

Hyperlink:http://www.securityfocus.com/bid/50356

External Source: SECUNIA

Name: 46964

Hyperlink:http://secunia.com/advisories/46964

External Source: SECUNIA

Name: 46934

Hyperlink:http://secunia.com/advisories/46934

External Source: SECUNIA

Name: 46578

Type: Advisory

Hyperlink:http://secunia.com/advisories/46578

External Source: SECUNIA

Name: 46550

Type: Advisory

Hyperlink:http://secunia.com/advisories/46550

External Source: CONFIRM

Name: http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/

Hyperlink:http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/