Kernel security update: CVE-2018-5803; Virtuozzo ReadyKernel patch 52.0 for Virtuozzo 7.0.3, 7.0.4, 7.0.4 HF3, 7.0.5, and 7.0.6¶

1. Overview¶

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to Virtuozzo 7.0 kernels 3.10.0-327.42.0.vz7.20.18 (7.0.3), 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), and 3.10.0-693.1.1.vz7.37.30 (7.0.6).

2. Security Fixes¶

• [Moderate] It was found that _sctp_make_chunk() function did not check if the chunk length for INIT and INIT_ACK packets was within the allowed limits. A local attacker could exploit this to trigger a kernel crash. (CVE-2018-5803)

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-20.18-52.0-2.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.10-52.0-2.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-52.0-2.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-52.0-2.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-52.0-2.vl7/

• https://access.redhat.com/security/cve/cve-2018-5803

The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2018-035.json.