Important kernel security update: CVE-2018-1068; Virtuozzo ReadyKernel patch 47.0 for Virtuozzo 7.0.1 to 7.0.6 HF3¶

1. Overview¶

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to all supported Virtuozzo 7.0 kernels except 3.10.0-693.17.1.vz7.43.10 (7.0.7).

2. Security Fixes¶

• [Important] It was discovered that the implementation of ebtables in the kernel did not properly validate the offsets received from the user space. A local user with enough privileges in the user and network namespaces could use that to trigger an out-of-bounds write to the kernel address space. (CVE-2018-1068)

3. Installing the Update¶

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

4. References¶

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-18.7-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-20.18-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.10-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-47.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-40.4-47.0-1.vl7/

• https://access.redhat.com/security/cve/CVE-2018-1068

The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2018-014.json.