CVE-2012-5515 Denial of service in n/a

Medium 4.7 Published 13 Dec 2012 Updated 6 Aug 2024

Local guest administrators can cause a denial of service in the Xen hypervisor by triggering a long loop via crafted hypercall parameters.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2012-5515?

CVE-2012-5515 is a medium-severity denial of service vulnerability in Xen Xen, published on 13 Dec 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.

Which versions are affected by CVE-2012-5515?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2012-5515?

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-2012-5515 being exploited?

There is no known exploitation of CVE-2012-5515 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2012-5515, GHSA-h2f3-x3v9-p3c5.