1. Ubuntu Security Notices
  2. USN-6088-1

USN-6088-1: runC vulnerabilities

Publication date

18 May 2023

Overview

Several security issues were fixed in runC.

Releases

Packages

  • runc - Open Container Project

Details

It was discovered that runC incorrectly made /sys/fs/cgroup
writable when in rootless mode. An attacker could possibly
use this issue to escalate privileges. (CVE-2023-25809)

It was discovered that runC incorrectly performed access control when
mounting /proc to non-directories. An attacker could possibly use
this issue to escalate privileges. (CVE-2023-27561)

It was discovered that runC incorrectly handled /proc and
/sys mounts inside a container. An attacker could possibly
use this issue to bypass AppArmor, and potentially SELinux.
(CVE-2023-28642)

It was discovered that runC incorrectly made /sys/fs/cgroup
writable when in rootless mode. An attacker could possibly
use this issue to escalate privileges. (CVE-2023-25809)

It was discovered that runC incorrectly performed access control when
mounting /proc to non-directories. An attacker could possibly use
this issue to escalate privileges. (CVE-2023-27561)

It was discovered that runC incorrectly handled /proc and
/sys mounts inside a container. An attacker could possibly
use this issue to bypass AppArmor, and potentially SELinux.
(CVE-2023-28642)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
23.04 lunar runc –  1.1.4-0ubuntu3.1
22.10 kinetic runc –  1.1.4-0ubuntu1~22.10.3
22.04 jammy runc –  1.1.4-0ubuntu1~22.04.3
20.04 focal runc –  1.1.4-0ubuntu1~20.04.3
18.04 bionic runc –  1.1.4-0ubuntu1~18.04.2

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References

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