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Important kernel security update: CVE-2017-8797 and other; Virtuozzo ReadyKernel patch 25.0 for Virtuozzo 7.0.0, 7.0.1, and 7.0.3

Issue date: 2017-07-05

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2017-062

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security fixes. 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), and 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3).

2. Security Fixes

  • [Important] The NFSv4 server in the Linux kernel compiled with CONFIG_NFSD_PNFS enabled does not properly validate layout type when processing NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands. The attack payload fits to single one-way UDP packet. The provided input value is used for array dereferencing. This may lead to a remote DoS of [knfsd] and so to a soft-lockup of a whole system. (CVE-2017-8797)

  • [Moderate] A vulnerability was found in the implementation of setsockopt() operations in the Linux kernel. A privileged user inside a container could cause a DoS attack on the host (kernel deadlock in ip_ra_control() function) using a specially crafted sequence of system calls. (PSBM-64752)

3. Installing the Update

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

Nov 18, 2024
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