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    CVE-2009-3766

    mutt_ssl.c in mutt 1.5.16 and other versions before 1.5.19, when OpenSSL is used, does not verify the domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

    Published:Aug 10, 2009
    Last Modified:Apr 23, 2026
    EPS:Oct 23, 2009
    EPSS Score:0.00396
    CVSS Score:6.8

    Affected Products

    Vendor
    Mutt
    Product
    Mutt
    Vendor
    Openssl
    Product
    Openssl

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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