CVE-2011-3872

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    CVE-2011-3872

    Published: 27 Oct 2011Last Modified: 10 Apr 2026

    Summary:

    Details: 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."

    References: http://secunia.com/advisories/46550, http://secunia.com/advisories/46578, http://secunia.com/advisories/46934, http://secunia.com/advisories/46964, http://www.ubuntu.com/usn/USN-1238-1, http://www.ubuntu.com/usn/USN-1238-2, http://puppetlabs.com/blog/important-security-announcement-altnames-vulnerability/, http://groups.google.com/group/puppet-announce/browse_thread/thread/e7edc3a71348f3e1, http://www.securityfocus.com/bid/50356, https://exchange.xforce.ibmcloud.com/vulnerabilities/70970, https://puppet.com/security/cve/cve-2011-3872

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High