Kernel security update: CVE-2017-15274; Virtuozzo ReadyKernel patch 34.0 for Virtuozzo 7.0.x

Issue date: 2017-10-16

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2017-094

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to Virtuozzo kernels 3.10.0-327.18.2.vz7.15.2 (Virtuozzo 7.0.0), 3.10.0-327.36.1.vz7.18.7 (Virtuozzo 7.0.1), 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3), 3.10.0-514.16.1.vz7.30.10 (Virtuozzo 7.0.4), 3.10.0-514.16.1.vz7.30.15 (Virtuozzo 7.0.4 HF3), and 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5).

2. Security Fixes

  • [Moderate] A flaw was discovered in the key management subsystem of the Linux kernel. It allowed to pass NULL payload with non-zero payload length as parameters to sys_add_key() and the KEYCTL_UPDATE operation of sys_keyctl(). A local unprivileged user could exploit this to cause a kernel crash (NULL pointer dereference). (CVE-2017-15274)

3. Installing the Update

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