CVE-2012-3433 Denial of service in n/a

Medium 4.9 Published 24 Nov 2012 Updated 6 Aug 2024

A local HVM guest kernel can cause a denial of service in the Xen hypervisor by triggering excessive shared page search time during teardown.

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-2012-3433?

CVE-2012-3433 is a medium-severity denial of service vulnerability in Xen Xen, published on 24 Nov 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Xen 4.0 and 4.1 allows local HVM guest OS kernels to cause a denial of service (domain 0 VCPU hang and kernel panic) by modifying the physical address space in a way that triggers excessive shared page search time during the p2m teardown.

Weakness: CWE-399

Which versions are affected by CVE-2012-3433?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2012-3433?

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-2012-3433 being exploited?

There is no known exploitation of CVE-2012-3433 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2012-3433, GHSA-4r2q-mgcp-7w6w.