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    CVE-2022-0547

    OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.

    Published:Mar 18, 2022
    Last Modified:Nov 3, 2025
    EPS:Mar 18, 2022
    EPSS Score:0.00555
    CVSS Score:9.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Openvpn
    Product
    Openvpn

    Exploits

    No exploit reference

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    References

    https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
    https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
    https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
    https://openvpn.net/community-downloads/
    https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
    https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements
    https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
    https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/
    https://openvpn.net/community-downloads/

    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