UBUNTU-CVE-2021-41089

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    UBUNTU-CVE-2021-41089

    Published: 4 Oct 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-41089
    Aliases:
    USN-5103-1

    Summary:

    Details: Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the host’s filesystem, widening access to others. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers do not need to be restarted.

    References: https://ubuntu.com/security/CVE-2021-41089, https://github.com/moby/moby/security/advisories/GHSA-v994-f8vw-g7j4, https://ubuntu.com/security/notices/USN-5103-1, https://www.cve.org/CVERecord?id=CVE-2021-41089

    Affected packages

    Package

    Name: docker.io

    Purl: pkg:deb/ubuntu/[email protected]~16.04.9+esm1?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -18.09.7-0ubuntu1~16.04.9+esm1

    Affected versions

    1.6.2~dfsg1-1ubuntu4

    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-2021-41089 | CVE-DB