puppet: MITM by the x509v3 certificate signing
Published Oct 27, 2011
2.6
LOWCVSS 2.0
EPSS 2.50%
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."
Affected products
No data.
Configuration 1
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.6.9
- 2.6.10
- 2.6.11
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.0
- 2.7.1
Configuration 2
- 1.2.0
- 1.2.1
- 1.2.2
- 1.2.3
- 1.0
- 1.1
No data.
Red Hat Enterprise MRG 1
puppet
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise MRG 1 | puppet | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.50% (0.02502) | 84.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.43% (0.02434) | 82.08th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.78% (0.02778) | 84.78th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.15% (0.08152) | 86.71th | v4 (v2025.03.14) |
| Mar 28, 2025 | 2.78% (0.02778) | 84.79th | v4 (v2025.03.14) |
| Mar 27, 2025 | 8.15% (0.08152) | 90.97th | v4 (v2025.03.14) |
| Mar 20, 2025 | 2.78% (0.02778) | 84.87th | v4 (v2025.03.14) |
| Mar 19, 2025 | 8.15% (0.08152) | 91.11th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.78% (0.02778) | 85.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.42% (0.00416) | 74.90th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.42% (0.00416) | 73.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.42% (0.00416) | 70.04th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (16)
- http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1 x_refsource_CONFIRMPatch
- http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/ x_refsource_CONFIRM
- http://secunia.com/advisories/46550 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/46578 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/46934 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/46964 third-party-advisoryx_refsource_SECUNIA
- http://www.puppetlabs.com/security/cve/cve-2011-3872/
- http://www.securityfocus.com/bid/50356 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1238-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-1238-2 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2011-3872 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=748447 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/70970 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-3872
- https://puppet.com/security/cve/cve-2011-3872 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2011-3872
Change history (0)
No recorded changes yet.