GHSA-mvff-h3cj-wj9c

    Dashboard / Vulnerabilities / GHSA-mvff-h3cj-wj9c

    GHSA-mvff-h3cj-wj9c

    Published: 6 Jan 2022Last Modified: 8 Jul 2026

    Summary: Unprivileged pod using `hostPath` can side-step active LSM when it is SELinux

    Details: ### Impact Containers launched through containerd’s CRI implementation on Linux systems which use the SELinux security module and containerd versions since v1.5.0 can cause arbitrary files and directories on the host to be relabeled to match the container process label through the use of specially-configured bind mounts in a hostPath volume. This relabeling elevates permissions for the container, granting full read/write access over the affected files and directories. Kubernetes and crictl can both be configured to use containerd’s CRI implementation. If you are not using containerd’s CRI implementation (through one of the mechanisms described above), you are not affected by this issue. ### Patches This bug has been fixed in containerd 1.5.9. Because file labels persist independently of containerd, users should both update to these versions as soon as they are released and validate that all files on their host are correctly labeled. ### Workarounds Ensure that no sensitive files or directories are used as a hostPath volume source location. Policy enforcement mechanisms such a Kubernetes Pod Security Policy [AllowedHostPaths](https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems) may be specified to limit the files and directories that can be bind-mounted to containers. ### For more information If you have any questions or comments about this advisory: * Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [[email protected]](mailto:[email protected])

    References: https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c, https://nvd.nist.gov/vuln/detail/CVE-2021-43816, https://github.com/containerd/containerd/issues/6194, https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea, https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299, https://github.com/containerd/containerd, https://lists.fedoraproject.org/archives/list/[email protected]/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX, https://lists.fedoraproject.org/archives/list/[email protected]/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID

    Affected packages

    Package

    Name: github.com/containerd/containerd

    Purl: pkg:golang/github.com/containerd/containerd

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 1.5.0
    Fixed -1.5.9

    Affected versions

    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
    GHSA-mvff-h3cj-wj9c | CVE-DB