CVE-2012-0218 Denial of service in n/a

Low 1.9 Published 3 Dec 2012 Updated 6 Aug 2024

Local guest OS users can crash the guest by triggering an exception due to improper flag clearing in Xen hypervisor.

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-2012-0218?

CVE-2012-0218 is a low-severity denial of service vulnerability in Xen Xen, published on 3 Dec 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Xen 3.4, 4.0, and 4.1, when the guest OS has not registered a handler for a syscall or sysenter instruction, does not properly clear a flag for exception injection when injecting a General Protection Fault, which allows local PV guest OS users to cause a denial of service (guest crash) by later triggering an exception that would normally be handled within Xen.

Which versions are affected by CVE-2012-0218?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2012-0218?

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-2012-0218 being exploited?

There is no known exploitation of CVE-2012-0218 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2012-0218, GHSA-j3pq-42jm-m8p4.