CVE-2021-21334
Published: 5 March 2021
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.
Priority
Status
Package | Release | Status |
---|---|---|
containerd Launchpad, Ubuntu, Debian |
bionic |
Released
(1.5.2-0ubuntu1~18.04.2)
|
focal |
Released
(1.3.3-0ubuntu2.3)
|
|
groovy |
Released
(1.3.7-0ubuntu3.3)
|
|
hirsute |
Released
(1.4.4-0ubuntu1)
|
|
impish |
Released
(1.4.4-0ubuntu1)
|
|
jammy |
Released
(1.4.4-0ubuntu1)
|
|
kinetic |
Released
(1.4.4-0ubuntu1)
|
|
lunar |
Released
(1.4.4-0ubuntu1)
|
|
mantic |
Released
(1.4.4-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(1.3.10,1.4.4~ds1-1)
|
|
xenial |
Needed
|
|
Patches: upstream: https://github.com/containerd/containerd/commit/2d9c8aa4b3f4313982c5c999af57212a1c5d144b upstream: https://github.com/containerd/containerd/commit/cbcb2f57fbe221986f96b552855eb802f63193de upstream: https://github.com/containerd/cri/commit/7ea3462fc2d4e550b307cefb282b7408d7d7f997 upstream: https://github.com/containerd/cri/commit/f9bcbb7329a47f34261da2cfafa6bd5f63268437 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.3 |
Attack vector | Network |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Changed |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |