Kernel security update: CVE-2017-18017; Virtuozzo ReadyKernel patch 42.0 for Virtuozzo 7.0.4, 7.0.4 HF3, 7.0.5, 7.0.6, and 7.0.6 HF3¶
Issue date: 2018-01-12
Applies to: Virtuozzo 7.0
Virtuozzo Advisory ID: VZA-2018-005
The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to Virtuozzo kernels 3.10.0-514.16.1.vz7.30.10 (Virtuozzo 7.0.4), 3.10.0-514.16.1.vz7.30.15 (Virtuozzo 7.0.4 HF3), 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5), 3.10.0-693.1.1.vz7.37.30 (Virtuozzo 7.0.6), and 3.10.0-693.11.6.vz7.40.4 (Virtuozzo 7.0.6 HF3).
2. Security Fixes¶
[Moderate] If the system uses iptables and there are iptables rules with TCPMSS action there, a remote attacker could cause a denial of service (use-after-free in tcpmss_mangle_packet function leading to memory corruption) or possibly have unspecified other impact by sending specially crafted network packets. (CVE-2017-18017)
3. Installing the Update¶
Download, install, and instantly apply the patch to the current kernel by running ‘readykernel update’.
The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2018-005.json.