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    CVE-2023-20867

    A fully compromised ESXi host can force VMware Tools to fail to authenticate host-to-guest operations, impacting the confidentiality and integrity of the guest virtual machine.

    Published:Jun 13, 2023
    Last Modified:Oct 28, 2025
    EPS:Jun 13, 2023
    EPSS Score:0.01029
    CVSS Score:3.9

    CISA Notification

    Description

    A fully compromised ESXi host can force VMware Tools to fail to authenticate host-to-guest operations, impacting the confidentiality and integrity of the guest virtual machine.

    Required Action:

    Apply updates per vendor instructions.

    Notes:

    No extra notes provided.

    Due Date
    Jul 14, 2023
    1155 days ago
    Alert Date
    Jun 23, 2023
    1176 days ago

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Vmware
    Product
    Tools

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

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    References

    http://www.openwall.com/lists/oss-security/2023/10/16/11
    http://www.openwall.com/lists/oss-security/2023/10/16/2
    https://lists.debian.org/debian-lts-announce/2023/08/msg00020.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/NVKQ6Y2JFJRWPFOZUOTFO3H27BK5GGOG/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/TJNJMD67QIT6LXLKWSHFM47DCLRSMT6W/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/ZJM6HDRQYS74JA7YNKQBFH2XSZ52HEWH/
    https://security.netapp.com/advisory/ntap-20230725-0001/
    https://www.debian.org/security/2023/dsa-5493
    https://www.vmware.com/security/advisories/VMSA-2023-0013.html
    http://www.openwall.com/lists/oss-security/2023/10/16/11
    http://www.openwall.com/lists/oss-security/2023/10/16/2
    https://lists.debian.org/debian-lts-announce/2023/08/msg00020.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/NVKQ6Y2JFJRWPFOZUOTFO3H27BK5GGOG/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/TJNJMD67QIT6LXLKWSHFM47DCLRSMT6W/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/ZJM6HDRQYS74JA7YNKQBFH2XSZ52HEWH/
    https://security.netapp.com/advisory/ntap-20230725-0001/
    https://www.debian.org/security/2023/dsa-5493
    https://www.vmware.com/security/advisories/VMSA-2023-0013.html
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20867

    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