Advisory Published

USN-6088-1: runC vulnerabilities

First published: Thu May 18 2023(Updated: )

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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/runc<1.1.4-0ubuntu3.1
1.1.4-0ubuntu3.1
=23.04
All of
ubuntu/runc<1.1.4-0ubuntu1~22.10.3
1.1.4-0ubuntu1~22.10.3
=22.10
All of
ubuntu/runc<1.1.4-0ubuntu1~22.04.3
1.1.4-0ubuntu1~22.04.3
=22.04
All of
ubuntu/runc<1.1.4-0ubuntu1~20.04.3
1.1.4-0ubuntu1~20.04.3
=20.04
All of
ubuntu/runc<1.1.4-0ubuntu1~18.04.2
1.1.4-0ubuntu1~18.04.2
=18.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for these runC vulnerabilities?

    The vulnerability ID for these runC vulnerabilities is CVE-2023-25809.

  • What is the severity of the runC vulnerability CVE-2023-25809?

    The severity of the runC vulnerability CVE-2023-25809 is not specified.

  • How can an attacker exploit the runC vulnerability CVE-2023-25809?

    An attacker could exploit the runC vulnerability CVE-2023-25809 by exploiting incorrect privilege escalation due to the /sys/fs/cgroup directory being made writable in rootless mode.

  • Is there a fix available for the runC vulnerability CVE-2023-25809?

    Yes, a fix for the runC vulnerability CVE-2023-25809 is available.

  • Where can I find more information about the runC vulnerabilities?

    You can find more information about the runC vulnerabilities at the following references: [CVE-2023-28642](https://ubuntu.com/security/CVE-2023-28642), [CVE-2023-27561](https://ubuntu.com/security/CVE-2023-27561), [CVE-2023-25809](https://ubuntu.com/security/CVE-2023-25809).

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