QID 352847

Date Published: 2021-10-06

QID 352847: Amazon Linux Security Advisory for containerd: ALAS-2021-1540

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. (
( 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.

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Please refer to Amazon advisory: ALAS-2021-1540 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 352847

    CVE-2021-41103 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2021-1540 Amazon Linux URL Logo alas.aws.amazon.com/ALAS-2021-1540.html
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