USN-6088-1: runC vulnerabilities

Releases

• Ubuntu 23.04
• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

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)

Update instructions

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

Ubuntu 23.04

• runc - 1.1.4-0ubuntu3.1

Ubuntu 22.10

• runc - 1.1.4-0ubuntu1~22.10.3

Ubuntu 22.04

• runc - 1.1.4-0ubuntu1~22.04.3

Ubuntu 20.04

• runc - 1.1.4-0ubuntu1~20.04.3

Ubuntu 18.04

• runc - 1.1.4-0ubuntu1~18.04.2

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

References

• CVE-2023-28642
• CVE-2023-27561
• CVE-2023-25809

Related notices

• USN-6088-2