CVE-2018-19967 Denial of service in n/a

Medium 6.5 Published 8 Dec 2018 Updated 5 Aug 2024

Guest OS users can cause a host OS hang on Intel x86 platforms due to improper handling of HLE transactions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2018-19967?

CVE-2018-19967 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 8 Dec 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of certain HLE transactions associated with the KACQUIRE instruction prefix.

Weakness: CWE-20

Which versions are affected by CVE-2018-19967?

It affects 2 products.

Linux distribution packages (3)

`xen` SUSE:Linux Enterprise Module for Basesystem 15	All versions	`4.10.3_02-3.14.1`
`xen` SUSE:Linux Enterprise Module for Server Applications 15	All versions	`4.10.3_02-3.14.1`
`xen` openSUSE:Leap 15.0	All versions	`4.10.3_02-lp150.2.16.1`

Products include Debian Debian Linux, Xen Xen.

How do I fix CVE-2018-19967?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-19967 being exploited?

There is no known exploitation of CVE-2018-19967 in the wild and no public exploit code.

All Debian Debian Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2018-19967, DEBIAN-CVE-2018-19967, GHSA-qr6c-xrp9-38xv, SUSE-SU-2019:0875-1, UBUNTU-CVE-2018-19967, openSUSE-SU-2019:1199-1.