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Kernel security update: Virtuozzo ReadyKernel patch 54.0 for Virtuozzo 7.0.7 HF2 and 7.0.7 HF3

Issue date: 2018-07-13

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2018-046

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo 7.0 kernels 3.10.0-693.21.1.vz7.46.7 (7.0.7 HF2) and 3.10.0-693.21.1.vz7.48.2 (7.0.7 HF3).

2. Security Fixes

  • [Moderate] By mmap()ing a FUSE-backed file onto a process’s memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc//cmdline (or /proc//environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

3. Bug Fixes

  • Kernel crashes (NULL pointer dereference) if memory allocation fails in alloc_vfsmnt(). (PSBM-86420)

  • Kernel crash in fuse_direct_IO_bvec(). (PSBM-86446)

4. Installing the Update

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

Dec 12, 2024
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