CVE-2011-4318

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    CVE-2011-4318

    Published: 7 Mar 2013Last Modified: 10 Apr 2026

    Summary:

    Details: Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.

    References: http://rhn.redhat.com/errata/RHSA-2013-0520.html, http://secunia.com/advisories/46886, http://secunia.com/advisories/52311, https://bugzilla.redhat.com/show_bug.cgi?id=754980, http://hg.dovecot.org/dovecot-2.0/rev/5e9eaf63a6b1, http://www.dovecot.org/list/dovecot-news/2011-November/000200.html, http://www.openwall.com/lists/oss-security/2011/11/18/5, http://www.openwall.com/lists/oss-security/2011/11/18/7, https://bugs.gentoo.org/show_bug.cgi?id=390887

    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