1. Ubuntu Security Notices
  2. USN-4867-1

USN-4867-1: runC vulnerabilities

Publication date

10 August 2021

Overview

Several security issues were fixed in runC.

Releases

Packages

  • runc - Open Container Project

Details

It was discovered that runC incorrectly checked mount targets. An attacker
with a malicious container image could possibly mount over the /proc
directory and escalate privileges. (CVE-2019-16884)

Etienne Champetier discovered that runC incorrectly checked mount targets.
An attacker with a malicious container image could possibly mount the host
filesystem into the container and escalate privileges. (CVE-2021-30465)

It was discovered that runC incorrectly checked mount targets. An attacker
with a malicious container image could possibly mount over the /proc
directory and escalate privileges. (CVE-2019-16884)

Etienne Champetier discovered that runC incorrectly checked mount targets.
An attacker with a malicious container image could possibly mount the host
filesystem into the container and escalate privileges. (CVE-2021-30465)

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
16.04 xenial runc –  1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2  

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References

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