CVE-2015-8338 Denial of service in n/a
ARM guest administrators can cause host denial of service via improper memory operation limits in Xen hypervisor.
- 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-2015-8338?
CVE-2015-8338 is a high-severity denial of service vulnerability in Xen Xen, published on 17 Dec 2015. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_memory_op suboperations, which allows ARM guest OS administrators to cause a denial of service (CPU consumption, guest reboot, or watchdog timeout and host reboot) and possibly have unspecified other impact via unknown vectors.
Weakness: CWE-254
Which versions are affected by CVE-2015-8338?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2015-8338?
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-2015-8338 being exploited?
There is no known exploitation of CVE-2015-8338 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2015-8338, GHSA-2h27-hv8q-h9cg, UBUNTU-CVE-2015-8338.