5 - USN-4297-1

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

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

References:
https://usn.ubuntu.com/4297-1
CVE-2019-16884, CVE-2019-19921

Package Information:
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc10-0ubuntu1~19.10.2
https://launchpad.net/ubuntu/+source/runc/1.0.0~rc10-0ubuntu1~18.04.2