Vulnerability Report

CVE-2011-3872

Title: Puppetlabs Puppet Improper Input Validation

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2011-3872.

CWE Category CWE-20
Published Date Oct 27, 2011
Modified Date Apr 29, 2026
Exploit Status Not Found
Score 2.6 CVSS v2.0
Exploit Probability (EPSS)
2.78%

Vulnerability Summary

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."

Impacted Vendors

R
reductivelabs 1
P
puppet 2
P
puppetlabs 3

Reference Links

http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/ http://secunia.com/advisories/46550 http://secunia.com/advisories/46578 http://secunia.com/advisories/46934 http://secunia.com/advisories/46964 http://www.securityfocus.com/bid/50356 http://www.ubuntu.com/usn/USN-1238-1 http://www.ubuntu.com/usn/USN-1238-2 https://exchange.xforce.ibmcloud.com/vulnerabilities/70970 https://puppet.com/security/cve/cve-2011-3872 http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/ http://secunia.com/advisories/46550 http://secunia.com/advisories/46578 http://secunia.com/advisories/46934 http://secunia.com/advisories/46964 http://www.securityfocus.com/bid/50356 http://www.ubuntu.com/usn/USN-1238-1 http://www.ubuntu.com/usn/USN-1238-2 https://exchange.xforce.ibmcloud.com/vulnerabilities/70970 https://puppet.com/security/cve/cve-2011-3872
CVSS v2.0
Source Entity [email protected]
Severity LOW
2.6
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:H/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2011-3872 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A
Complexity N/A
Privileges N/A
Interaction NONE
CVSS Vector String AV:N/AC:H/Au:N/C:N/I:P/A:N

Affected Stack

No specific products linked.