CVE-2022-23471

Publication date 8 December 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
containerd	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Fixed 1.6.4-0ubuntu1.1
	22.04 LTS jammy	Fixed 1.5.9-0ubuntu3.1
	20.04 LTS focal	Fixed 1.5.9-0ubuntu1~20.04.6
	18.04 LTS bionic	Fixed 1.5.9-0ubuntu1~18.04.2
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Ignored end of standard support

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)