USN-4297-1: runC vulnerabilities

9 March 2020

runc vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.10
  • Ubuntu 18.04 LTS

Summary

Several security issues were fixed in runc.

Software Description

  • 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. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-16884)

It was discovered that runC incorrectly performed access control. An attacker could possibly use this issue to escalate privileges. (CVE-2019-19921)

Update instructions

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

Ubuntu 19.10
runc - 1.0.0~rc10-0ubuntu1~19.10.2
Ubuntu 18.04 LTS
runc - 1.0.0~rc10-0ubuntu1~18.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References