CVE-2012-3432 Denial of service in n/a
Local guest OS users can crash the guest system by exploiting improper state resets in the Xen MMIO emulator.
- 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-2012-3432?
CVE-2012-3432 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
The handle_mmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service (guest OS crash) via unspecified operations on MMIO regions.
Weakness: CWE-264
Which versions are affected by CVE-2012-3432?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2012-3432?
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-2012-3432 being exploited?
There is no known exploitation of CVE-2012-3432 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2012-3432, GHSA-rx77-gcq6-838g.