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."

Published: 2011-10-27 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3872 is rated Low Risk (35.1/100): CVSS Low severity, with medium exploitation likelihood (EPSS 2.78%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-3872

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 8.15% 2.78% -5.37%
2 2025-03-29 2.78% 8.15% +5.37%
3 2025-03-28 — 2.78% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3872

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.6 2.0 LOW
AV:N/AC:H/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 2.9 [email protected]

Weakness enumeration for CVE-2011-3872

OS Trackers for CVE-2011-3872

vendor priority summary link
debian not yet assigned CVE-2011-3872 not yet assigned priority: Debian including 1 source packages (puppet), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2011-3872
gentoo high CVE-2011-3872: 1 GLSA(s) (201203-03), 1 atom(s) (app-admin/puppet); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-3872
redhat high — https://access.redhat.com/security/cve/CVE-2011-3872
ubuntu high CVE-2011-3872 high priority: Ubuntu including 1 source packages (puppet), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 5, ignored 1. https://ubuntu.com/security/CVE-2011-3872

Affected software / configurations for CVE-2011-3872

Vendor Product Version Raw CPE
puppet puppet 2.6.0 cpe:2.3:a:puppet:puppet:2.6.0:*:*:*:*:*:*:*
puppet puppet 2.6.1 cpe:2.3:a:puppet:puppet:2.6.1:*:*:*:*:*:*:*
puppet puppet 2.6.2 cpe:2.3:a:puppet:puppet:2.6.2:*:*:*:*:*:*:*
puppet puppet 2.6.3 cpe:2.3:a:puppet:puppet:2.6.3:*:*:*:*:*:*:*
puppet puppet 2.6.4 cpe:2.3:a:puppet:puppet:2.6.4:*:*:*:*:*:*:*
puppet puppet 2.6.5 cpe:2.3:a:puppet:puppet:2.6.5:*:*:*:*:*:*:*
puppet puppet 2.6.6 cpe:2.3:a:puppet:puppet:2.6.6:*:*:*:*:*:*:*
puppet puppet 2.6.7 cpe:2.3:a:puppet:puppet:2.6.7:*:*:*:*:*:*:*
puppet puppet 2.6.8 cpe:2.3:a:puppet:puppet:2.6.8:*:*:*:*:*:*:*
puppet puppet 2.6.9 cpe:2.3:a:puppet:puppet:2.6.9:*:*:*:*:*:*:*
puppet puppet 2.6.10 cpe:2.3:a:puppet:puppet:2.6.10:*:*:*:*:*:*:*
puppet puppet 2.6.11 cpe:2.3:a:puppet:puppet:2.6.11:*:*:*:*:*:*:*
puppet puppet 2.7.2 cpe:2.3:a:puppet:puppet:2.7.2:*:*:*:*:*:*:*
puppet puppet 2.7.3 cpe:2.3:a:puppet:puppet:2.7.3:*:*:*:*:*:*:*
puppet puppet 2.7.4 cpe:2.3:a:puppet:puppet:2.7.4:*:*:*:*:*:*:*
puppet puppet 2.7.5 cpe:2.3:a:puppet:puppet:2.7.5:*:*:*:*:*:*:*
puppetlabs puppet 2.7.0 cpe:2.3:a:puppetlabs:puppet:2.7.0:*:*:*:*:*:*:*
puppetlabs puppet 2.7.1 cpe:2.3:a:puppetlabs:puppet:2.7.1:*:*:*:*:*:*:*
puppet puppet_enterprise 1.2.0 cpe:2.3:a:puppet:puppet_enterprise:1.2.0:*:*:*:*:*:*:*
puppet puppet_enterprise 1.2.1 cpe:2.3:a:puppet:puppet_enterprise:1.2.1:*:*:*:*:*:*:*
puppet puppet_enterprise 1.2.2 cpe:2.3:a:puppet:puppet_enterprise:1.2.2:*:*:*:*:*:*:*
puppet puppet_enterprise 1.2.3 cpe:2.3:a:puppet:puppet_enterprise:1.2.3:*:*:*:*:*:*:*
puppetlabs puppet_enterprise_users 1.0 cpe:2.3:a:puppetlabs:puppet_enterprise_users:1.0:*:*:*:*:*:*:*
puppetlabs puppet_enterprise_users 1.1 cpe:2.3:a:puppetlabs:puppet_enterprise_users:1.1:*:*:*:*:*:*:*

References for CVE-2011-3872

cvelogic Threat Intelligence