Important kernel security update: CVE-2018-1068; Virtuozzo ReadyKernel patch 47.0 for Virtuozzo 7.0.1 to 7.0.6 HF3

Issue date: 2018-03-22

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2018-014

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to all supported Virtuozzo 7.0 kernels except 3.10.0-693.17.1.vz7.43.10 (7.0.7).

2. Security Fixes

  • [Important] It was discovered that the implementation of ebtables in the kernel did not properly validate the offsets received from the user space. A local user with enough privileges in the user and network namespaces could use that to trigger an out-of-bounds write to the kernel address space. (CVE-2018-1068)

3. Installing the Update

Download, install, and instantly apply the patch to the current kernel by running ‘readykernel update’.