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Ubuntu Security Notice USN-4960-1
May 19, 2021
runc vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
runC could be made to overwrite files as the administrator.
Software Description:
- runc: Open Container Project
Details:
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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.04:
runc 1.0.0~rc93-0ubuntu1.1
Ubuntu 20.10:
runc 1.0.0~rc93-0ubuntu1~20.10.2
Ubuntu 20.04 LTS:
runc 1.0.0~rc93-0ubuntu1~20.04.2
Ubuntu 18.04 LTS:
runc 1.0.0~rc93-0ubuntu1~18.04.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-4960-1
CVE-2021-30465
Package Information:
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1.1
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~20.10.2
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~20.04.2
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc93-0ubuntu1~18.04.2
