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."
Metrics
CVSS 2.0 2.6/10
AV:N/AC:H/Au:N/C:N/I:P/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1Patch
- http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/
- http://secunia.com/advisories/46550Vendor Advisory
- http://secunia.com/advisories/46578Vendor Advisory
- 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/e7edc3a71348f3e1Patch
- http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/
- http://secunia.com/advisories/46550Vendor Advisory
- http://secunia.com/advisories/46578Vendor Advisory
- 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
Timeline
- Published
- Oct 27, 2011
- Last modified
- Jun 16, 2026
- NVD status
- Modified