CVE-2022-0547

    Dashboard / Vulnerabilities / CVE-2022-0547

    CVE-2022-0547

    Published: 18 Mar 2022Last Modified: 24 Oct 2026

    Summary:

    Details: 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.

    References: https://community.openvpn.net/openvpn/wiki/CVE-2022-0547, https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements, https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html, https://openvpn.net/community-downloads/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/0xxx/CVE-2022-0547.json, 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://nvd.nist.gov/vuln/detail/CVE-2022-0547, https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4580320b22946a1dd65039a6efcd616ee5e4ac3b
    Fixed -058407a89cb812115b383570b12f4c2fde500d39

    Affected versions

    v2.5.5
    v2.5.4
    v2.5.3
    v2.5.2
    v2.5.1
    v2.5.0

    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
    CVE-2022-0547 | CVE-DB