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    CVE-2018-8970

    The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.

    Published:Mar 24, 2018
    Last Modified:Nov 21, 2024
    EPS:Mar 24, 2018
    EPSS Score:0.00397
    CVSS Score:7.4

    Affected Products

    Vendor
    Openbsd
    Product
    Libressl

    Exploits

    https://github.com/tiran/CVE-2018-8970

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

    Related CVEs

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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