CVE-2015-7813 Denial of service in n/a
Local guests can cause a denial of service by triggering unimplemented hypercalls that generate excessive console messages.
- 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-2015-7813?
CVE-2015-7813 is a low-severity denial of service vulnerability in Xen Xen, published on 30 Oct 2015. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of (1) HYPERVISOR_physdev_op hypercalls, which are not properly handled in the do_physdev_op function in arch/arm/physdev.c, or (2) HYPERVISOR_hvm_op hypercalls, which are not properly handled in the do_hvm_op function in arch/arm/hvm.c.
Weakness: CWE-399
Which versions are affected by CVE-2015-7813?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2015-7813?
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-2015-7813 being exploited?
There is no known exploitation of CVE-2015-7813 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2015-7813, GHSA-r32v-853x-3fjx, UBUNTU-CVE-2015-7813.