QID 356886

Date Published: 2024-01-16

QID 356886: Amazon Linux Security Advisory for containerd : ALAS2ECS-2023-027

Containerd is an open source container runtime with an emphasis on simplicity, robustness and portability.
A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged linux users to traverse directory contents and execute programs.
When containers included executable programs with extended permission bits (such as setuid), unprivileged linux users could discover and execute those programs.
When the uid of an unprivileged linux user on the host collided with the file owner or group inside a container, the unprivileged linux user on the host could discover, read, and modify those files.
This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7.
Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability.
Users unable to update should limit access to the host to trusted users.
Update directory permission on container bundles directories. (
( CVE-2021-41103)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2ECS-2023-027 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356886

    CVE-2021-41103 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2ECS-2023-027 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASECS-2023-027.html
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