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CVE-2022-23648

Publication date 2 March 2022

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

containerd is a container runtime available as a daemon for Linux and Windows. A bug was found in containerd prior to versions 1.6.1, 1.5.10, and 1.14.12 where containers launched through containerd’s CRI implementation on Linux with a specially-crafted image configuration could gain access to read-only copies of arbitrary files and directories on the host. This may bypass any policy-based enforcement on container setup (including a Kubernetes Pod Security Policy) and expose potentially sensitive information. Kubernetes and crictl can both be configured to use containerd’s CRI implementation. This bug has been fixed in containerd 1.6.1, 1.5.10, and 1.4.12. Users should update to these versions to resolve the issue.

From the Ubuntu Security Team

It was discovered that containerd allows attackers to gain access to read-only copies of arbitrary files and directories on the host via a specially-crafted image configuration. An attacker could possibly use this issue to obtain sensitive information.

Read the notes from the security team

Status

Package Ubuntu Release Status
containerd 22.04 LTS jammy
Fixed 1.5.9-0ubuntu2
21.10 impish
Fixed 1.5.9-0ubuntu1~21.10.3
20.04 LTS focal
Fixed 1.5.9-0ubuntu1~20.04.4
18.04 LTS bionic
Fixed 1.5.5-0ubuntu3~18.04.2
16.04 LTS xenial

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Notes

mdeslaur

While this was fixed in USN-5311-1, a subsequent SRU regressed the security update.

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references