USN-6088-2: runC vulnerabilities
23 May 2023
Several security issues were fixed in runC.
Releases
Packages
- runc - Open Container Project
Details
USN-6088-1 fixed vulnerabilities in runC. This update provides
the corresponding updates for Ubuntu 16.04 LTS.
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-2019-19921)
Felix Wilhelm discovered that runC incorrecly handled netlink
messages. An attacker could possibly use
this issue to escalate privileges. (CVE-2021-43784)
Andrew G. Morgan discovered that runC incorrectly set
inherited process capabilities inside the container.
An attacker could possibly use this issue to
escalate privileges. (CVE-2022-29162)
Original advisory 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 16.04
-
runc
-
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
Related notices
- USN-6088-1: runc, golang-github-opencontainers-runc-dev
- USN-4297-1: runc, golang-github-opencontainers-runc-dev