p PatchFirst

CVE-2021-41103

CVE-2021-41103 · Insufficiently restricted permissions on plugin directories

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.9 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: system · containers

Affected products and versions

  • containerd

    Versions
    • < 1.4.11: Affected
    • >= 1.5.0, < 1.5.7: Affected

    No fix published

  • containerd Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.5.7~ds1-1

    Update to 1.5.7~ds1-1

  • containerd Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.5.7~ds1-1

    Update to 1.5.7~ds1-1

  • containerd Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.5.7~ds1-1

    Update to 1.5.7~ds1-1

  • containerd Ubuntu:Pro:16.04:LTS

    Versions
    • 0.2.1-0ubuntu4~16.04
    • 0.2.3-0ubuntu1~16.04
    • 0.2.5-0ubuntu1~16.04.1
    • 1.2.6-0ubuntu1~16.04.2
    • 1.2.6-0ubuntu1~16.04.3
    • 1.2.6-0ubuntu1~16.04.4
    • 1.2.6-0ubuntu1~16.04.5
    • 1.2.6-0ubuntu1~16.04.6
    • 1.2.6-0ubuntu1~16.04.6+esm1
    Affected ranges
    • ECOSYSTEM: < 1.2.6-0ubuntu1~16.04.6+esm2

    Update to 1.2.6-0ubuntu1~16.04.6+esm2

  • containerd Ubuntu:18.04:LTS

    Versions
    • 0.2.5-0ubuntu2
    • 1.2.6-0ubuntu1~18.04.1
    • 1.2.6-0ubuntu1~18.04.2
    • 1.3.3-0ubuntu1~18.04.1
    • 1.3.3-0ubuntu1~18.04.2
    • 1.3.3-0ubuntu1~18.04.3
    • 1.3.3-0ubuntu1~18.04.4
    • 1.4.4-0ubuntu1~18.04.2
    • 1.5.2-0ubuntu1~18.04.1
    • 1.5.2-0ubuntu1~18.04.2
    Affected ranges
    • ECOSYSTEM: < 1.5.2-0ubuntu1~18.04.3

    Update to 1.5.2-0ubuntu1~18.04.3

  • containerd Ubuntu:20.04:LTS

    Versions
    • 1.2.10-0ubuntu1
    • 1.3.2-0ubuntu1
    • 1.3.3-0ubuntu1
    • 1.3.3-0ubuntu2
    • 1.3.3-0ubuntu2.1
    • 1.3.3-0ubuntu2.2
    • 1.3.3-0ubuntu2.3
    • 1.4.4-0ubuntu1~20.04.2
    • 1.5.2-0ubuntu1~20.04.1
    • 1.5.2-0ubuntu1~20.04.2
    Affected ranges
    • ECOSYSTEM: < 1.5.2-0ubuntu1~20.04.3

    Update to 1.5.2-0ubuntu1~20.04.3

  • containerd Ubuntu:22.04:LTS

    Affected ranges
    • ECOSYSTEM: < 1.5.5-0ubuntu3

    Update to 1.5.5-0ubuntu3

Original sources

Check your server →