UBUNTU-CVE-2020-8907

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    UBUNTU-CVE-2020-8907

    Published: 22 Jun 2020Last Modified: 24 Oct 2025
    Upstream:
    CVE-2020-8907

    Summary:

    Details: A vulnerability in Google Cloud Platform's guest-oslogin versions between 20190304 and 20200507 allows a user that is only granted the role "roles/compute.osLogin" to escalate privileges to root. Using their membership to the "docker" group, an attacker with this role is able to run docker and mount the host OS. Within docker, it is possible to modify the host OS filesystem and modify /etc/groups to gain administrative privileges. All images created after 2020-May-07 (20200507) are fixed, and if you cannot update, we recommend you edit /etc/group/security.conf and remove the "docker" user from the OS Login entry.

    References: https://ubuntu.com/security/CVE-2020-8907, https://cloud.google.com/support/bulletins/#gcp-2020-008, https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29, https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020, https://www.cve.org/CVERecord?id=CVE-2020-8907

    Affected packages

    Package

    Name: gce-compute-image-packages

    Purl: pkg:deb/ubuntu/gce-compute-image-packages@20190315-0ubuntu1~14.04.0?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    20160930-0ubuntu3~14.04.0
    20160930-0ubuntu3~14.04.1
    20160930-0ubuntu3~14.04.2

    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
    UBUNTU-CVE-2020-8907 | CVE-DB