containerd CRI stream server: Host memory exhaustion through terminal resize goroutine leak
CVE-2022-23471

5.7MEDIUM

Key Information:

Vendor

Containerd

Status
Containerd
Vendor
CVE Published:
7 December 2022

What is CVE-2022-23471?

containerd is an open source container runtime. A bug was found in containerd's CRI implementation where a user can exhaust memory on the host. In the CRI stream server, a goroutine is launched to handle terminal resize events if a TTY is requested. If the user's process fails to launch due to, for example, a faulty command, the goroutine will be stuck waiting to send without a receiver, resulting in a memory leak. Kubernetes and crictl can both be configured to use containerd's CRI implementation and the stream server is used for handling container IO. This bug has been fixed in containerd 1.6.12 and 1.5.16. Users should update to these versions to resolve the issue. Users unable to upgrade should ensure that only trusted images and commands are used and that only trusted users have permissions to execute commands in running containers.

Affected Version(s)

containerd < 1.5.16 < 1.5.16

containerd >= 1.6.0, < 1.6.12 < 1.6.0, 1.6.12

References

https://github.com/containerd/containerd/security/advisor...
x_refsource_CONFIRM
https://github.com/containerd/containerd/commit/a05d17540...
x_refsource_MISC
https://security.gentoo.org/glsa/202401-31

CVSS V3.1

Score:
5.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.