Advisory Published

USN-6088-2: runC vulnerabilities

First published: Tue May 23 2023(Updated: )

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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/runc<1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4
1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4
=16.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2019-19921?

    The severity of CVE-2019-19921 is moderate.

  • How do I fix the runC vulnerabilities in Ubuntu 16.04 LTS?

    To fix the runC vulnerabilities in Ubuntu 16.04 LTS, you need to update the runc package to version 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4.

  • What is CVE-2022-29162?

    CVE-2022-29162 is a vulnerability related to runC in Ubuntu 16.04 LTS.

  • What is CVE-2023-25809?

    CVE-2023-25809 is a vulnerability related to runC in Ubuntu 16.04 LTS.

  • What is CVE-2023-28642?

    CVE-2023-28642 is a vulnerability related to runC in Ubuntu 16.04 LTS.

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