Important kernel security update: CVE-2017-8824 and other; new kernel 2.6.32-042stab126.2, Virtuozzo 6.0 Update 12 Hotfix 19 (6.0.12-3689)

Issue date: 2017-12-15

Applies to: Virtuozzo 6.0

Virtuozzo Advisory ID: VZA-2017-114

1. Overview

This update provides a new Virtuozzo 6.0 kernel 2.6.32-042stab126.2 based on the Red Hat Enterprise Linux 6.9 kernel 2.6.32-696.16.1.el6. The new kernel introduces security and stability fixes.

2. Security Fixes

  • [Important] dccp_disconnect() set the socket state to DCCP_CLOSED but did not properly free some of the resources associated with that socket. This could result in a use-after-free and could potentially allow an attacker to escalate their privileges. (CVE-2017-8824)

  • [Important] The Linux kernel is vulnerable to a use-after-free issue. It could occur while closing a xfrm netlink socket, in xfrm_dump_policy_done. A user/process could use this flaw to potentially escalate their privileges on a system. (CVE-2017-16939)

3. Installing the Update

Install the update by running ‘yum update’.