{"id":"CVE-2011-3872","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-3872","generatedAt":"2026-10-28T03:22:23.118Z","title":"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…","description":"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":"2011-10-27T20:55:02.000Z","lastModified":"2026-06-16T23:34:04.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":2.6,"severity":"LOW","vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N"},"cwe":["CWE-20"],"affected":["puppet/puppet","puppetlabs/puppet","puppet/puppet enterprise","puppetlabs/puppet enterprise users"],"epss":{"score":0.02523,"percentile":0.8475,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.52%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/46550","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/46578","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/46934","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/46964","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/50356","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-1238-1","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-1238-2","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/70970","source":"cve@mitre.org"},{"url":"https://puppet.com/security/cve/cve-2011-3872","source":"cve@mitre.org"},{"url":"http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46550","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46578","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46934","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46964","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/50356","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1238-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1238-2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/70970","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://puppet.com/security/cve/cve-2011-3872","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-3872","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}