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Ubuntu Security Notice USN-4297-1

Ubuntu Security Notice USN-4297-1
Posted Mar 9, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4297-1 - 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. It was discovered that runC incorrectly performed access control. An attacker could possibly use this issue to escalate privileges. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2019-16884, CVE-2019-19921
SHA-256 | 4c43616d9540099069bfffeca945a4397bc0aedf5dea591e4a09aacf95b0ff9b

Ubuntu Security Notice USN-4297-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4297-1
March 09, 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

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
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