HOMEVULNERABILITIESCVE-2011-3872
LOW

CVE-2011-3872

CWE-20Published: October 27, 2011· Updated: Jun 16, 2026

2.6
CVSS v3.1

Official 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."

NVD Source

Technical Analysis

CVE-2011-3872 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityP
AvailabilityNone
AV:N/AC:H/Au:N/C:N/I:P/A:N

Affected Vendors & Products

puppet2 product(s)
puppetpuppet enterprise
puppetlabs2 product(s)
puppetpuppet enterprise users
Source: NVD CPE · 24 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1
PATCHhttp://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1
ADVISORYhttp://secunia.com/advisories/46550
ADVISORYhttp://secunia.com/advisories/46578
ADVISORYhttp://secunia.com/advisories/46550
ADVISORYhttp://secunia.com/advisories/46578

All References (22)

→
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

Quick Facts

CVE IDCVE-2011-3872
CVSS Score2.6 / 10
SeverityLOW
WeaknessCWE-20
CISA KEVNo
Affected2 vendor(s)
PublishedOct 27, 2011

Related CVEs (CWE-20)

CVE-2010-3186
10.0
CVE-2010-1518
10.0
CVE-2010-2193
10.0
CVE-2010-2298
10.0
CVE-2010-1517
10.0
CVE-2010-3491
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2011-3872 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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