Kernel security update: Virtuozzo ReadyKernel patch 54.0 for Virtuozzo 7.0.4 to 7.0.7 (excl. hotfixes)

Issue date: 2018-07-13

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2018-045

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo 7.0 kernels 3.10.0-514.16.1.vz7.30.10 (7.0.4), 3.10.0-514.16.1.vz7.30.15 (7.0.4 HF3), 3.10.0-514.26.1.vz7.33.22 (7.0.5), 3.10.0-693.1.1.vz7.37.30 (7.0.6), 3.10.0-693.11.6.vz7.40.4 (7.0.6 HF3), and 3.10.0-693.17.1.vz7.43.10 (7.0.7).

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)

4. Installing the Update

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

5. References

The JSON file with the list of new and updated packages is available at JSON file.