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CVE-2022-23648

Published: 2 March 2022

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.

Notes

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

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
containerd
Launchpad, Ubuntu, Debian
bionic
Released (1.5.5-0ubuntu3~18.04.2)
focal
Released (1.5.9-0ubuntu1~20.04.4)
impish
Released (1.5.9-0ubuntu1~21.10.3)
jammy
Released (1.5.9-0ubuntu2)
upstream
Released (1.6.1,1.5.11,1.4.13)

Severity score breakdown

Parameter Value
Base score 7.5
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