Improper input validation in Puppet
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."
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.6 (Low). Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.025 (84.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: +0.000
Affected products
- Puppet — versions 2.6.0, 2.6.1, 2.6.2
- Puppet Enterprise — versions 1.2.0, 1.2.1, 1.2.2
- Puppetlabs Puppet — versions 2.7.0, 2.7.1
- Puppetlabs Puppet Enterprise Users — versions 1.0, 1.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secunia.com/advisories/46550 (Vendor Advisory, third-party-advisory)
- www.ubuntu.com/usn/USN-1238-2 (vendor-advisory)
- puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/
- exchange.xforce.ibmcloud.com/vulnerabilities/70970 (vdb-entry)
- secunia.com/advisories/46578 (Vendor Advisory, third-party-advisory)
- puppet.com/security/cve/cve-2011-3872
- secunia.com/advisories/46934 (third-party-advisory)
- groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 (Patch)
- www.securityfocus.com/bid/50356 (vdb-entry)
- secunia.com/advisories/46964 (third-party-advisory)
Frequently asked questions
- What is CVE-2011-3872?
- CVE-2011-3872 is a vulnerability in Puppet, classified under Improper Input Validation. Published 2011-10-27.
- Is CVE-2011-3872 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.