Advisory Published

USN-4960-1: runC vulnerability

First published: Wed May 19 2021(Updated: )

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.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/runc<1.0.0~rc93-0ubuntu1.1
1.0.0~rc93-0ubuntu1.1
=21.04
All of
ubuntu/runc<1.0.0~rc93-0ubuntu1~20.10.2
1.0.0~rc93-0ubuntu1~20.10.2
=20.10
All of
ubuntu/runc<1.0.0~rc93-0ubuntu1~20.04.2
1.0.0~rc93-0ubuntu1~20.04.2
=20.04
All of
ubuntu/runc<1.0.0~rc93-0ubuntu1~18.04.2
1.0.0~rc93-0ubuntu1~18.04.2
=18.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is USN-4960-1.

  • What is the title of this vulnerability?

    The title of this vulnerability is USN-4960-1: runC vulnerability.

  • Who discovered this vulnerability?

    Etienne Champetier discovered this vulnerability.

  • How can an attacker exploit this vulnerability?

    An attacker with a malicious container image could possibly mount the host filesystem into the container and escalate privileges.

  • Which software versions are affected by this vulnerability?

    The affected software versions are runc 1.0.0~rc93-0ubuntu1.1 on Ubuntu 21.04, runc 1.0.0~rc93-0ubuntu1~20.10.2 on Ubuntu 20.10, runc 1.0.0~rc93-0ubuntu1~20.04.2 on Ubuntu 20.04, and runc 1.0.0~rc93-0ubuntu1~18.04.2 on Ubuntu 18.04.

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