CVE-2016-4963 Denial of service in n/a

Medium 4.7 Published 7 Jun 2016 Updated 6 Aug 2024

Local guest users can cause denial of service in Xen management tools by manipulating xenstore backend directories.

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-2016-4963?

CVE-2016-4963 is a medium-severity denial of service vulnerability in Xen Xen, published on 7 Jun 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The libxl device-handling in Xen through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore.

Weakness: CWE-284

Which versions are affected by CVE-2016-4963?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2016-4963?

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-2016-4963 being exploited?

There is no known exploitation of CVE-2016-4963 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2016-4963, GHSA-4wh7-gxf5-7gc2, UBUNTU-CVE-2016-4963.