p PatchFirst

CVE-2021-21334

CVE-2021-21334 · environment variable leak

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

In containerd (an industry-standard container runtime) before versions 1.3.10 and 1.4.4, containers launched through containerd's CRI implementation (through Kubernetes, crictl, or any other pod/container client that uses the containerd CRI service) that share the same image may receive incorrect environment variables, including values that are defined for other containers. If the affected containers have different security contexts, this may allow sensitive information to be unintentionally shared. If you are not using containerd's CRI implementation (through one of the mechanisms described above), you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image which have different environment variables, you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image in rapid succession, you have reduced likelihood of being vulnerable to this issue This vulnerability has been fixed in containerd 1.3.10 and containerd 1.4.4. Users should update to these versions.

CVSS 6.3 · Medium · EPSS 1.9% · Fix available

Published
Updated

Stack: system · containers

Affected products and versions

  • containerd

    Versions
    • < 1.3.10: Affected
    • >= 1.4.0, < 1.4.4: Affected

    No fix published

  • containerd Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.4.4~ds1-1

    Update to 1.4.4~ds1-1

  • containerd Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.4.4~ds1-1

    Update to 1.4.4~ds1-1

  • containerd Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.4.4~ds1-1

    Update to 1.4.4~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
    • 1.2.6-0ubuntu1~16.04.6+esm2
    • 1.2.6-0ubuntu1~16.04.6+esm4
    • 1.2.6-0ubuntu1~16.04.6+esm5
    • 1.2.6-0ubuntu1~16.04.6+esm6
    • 1.2.6-0ubuntu1~16.04.6+esm7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • 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
    Affected ranges
    • ECOSYSTEM: < 1.5.2-0ubuntu1~18.04.2

    Update to 1.5.2-0ubuntu1~18.04.2

  • 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
    Affected ranges
    • ECOSYSTEM: < 1.3.3-0ubuntu2.3

    Update to 1.3.3-0ubuntu2.3

Original sources

Check your server →