Vulnerability Monitor

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CVE-2011-3872

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."

Security Impact Summary

CVE-2011-3872 is a security vulnerability that . Impacting 4 products from puppet, from puppetlabs, from puppet and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-10-27T20:55:01.760

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 2.6 (LOW)

CVSSv2 Vector

AV:N/AC:H/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: HIGH
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

4.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	puppet	puppet	2.6.0	Yes
Application	puppet	puppet	2.6.1	Yes
Application	puppet	puppet	2.6.2	Yes
Application	puppet	puppet	2.6.3	Yes
Application	puppet	puppet	2.6.4	Yes
Application	puppet	puppet	2.6.5	Yes
Application	puppet	puppet	2.6.6	Yes
Application	puppet	puppet	2.6.7	Yes
Application	puppet	puppet	2.6.8	Yes
Application	puppet	puppet	2.6.9	Yes
Application	puppet	puppet	2.6.10	Yes
Application	puppet	puppet	2.6.11	Yes
Application	puppet	puppet	2.7.2	Yes
Application	puppet	puppet	2.7.3	Yes
Application	puppet	puppet	2.7.4	Yes
Application	puppet	puppet	2.7.5	Yes
Application	puppetlabs	puppet	2.7.0	Yes
Application	puppetlabs	puppet	2.7.1	Yes
Application	puppet	puppet_enterprise	1.2.0	Yes
Application	puppet	puppet_enterprise	1.2.1	Yes
Application	puppet	puppet_enterprise	1.2.2	Yes
Application	puppet	puppet_enterprise	1.2.3	Yes
Application	puppetlabs	puppet_enterprise_users	1.0	Yes
Application	puppetlabs	puppet_enterprise_users	1.1	Yes

References

http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 Patch ([email protected])
http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/ ([email protected])
http://secunia.com/advisories/46550 Vendor Advisory ([email protected])
http://secunia.com/advisories/46578 Vendor Advisory ([email protected])
http://secunia.com/advisories/46934 ([email protected])
http://secunia.com/advisories/46964 ([email protected])
http://www.securityfocus.com/bid/50356 ([email protected])
http://www.ubuntu.com/usn/USN-1238-1 ([email protected])
http://www.ubuntu.com/usn/USN-1238-2 ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/70970 ([email protected])
https://puppet.com/security/cve/cve-2011-3872 ([email protected])
http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/ (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46550 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46578 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46934 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46964 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/50356 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1238-1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1238-2 (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/70970 (af854a3a-2127-422b-91ae-364da2661108)
https://puppet.com/security/cve/cve-2011-3872 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For puppet's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.