CVE-2016-9385 Denial of service in n/a
Local guest administrators can crash the host system by exploiting missing canonical address checks in x86 segment base write emulation.
- 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-2016-9385?
CVE-2016-9385 is a medium-severity denial of service vulnerability in Citrix Xenserver, published on 23 Jan 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The x86 segment base write emulation functionality in Xen 4.4.x through 4.7.x allows local x86 PV guest OS administrators to cause a denial of service (host crash) by leveraging lack of canonical address checks.
Weakness: CWE-20
Which versions are affected by CVE-2016-9385?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2016-9385?
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-2016-9385 being exploited?
There is no known exploitation of CVE-2016-9385 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2016-9385, DEBIAN-CVE-2016-9385, GHSA-3fqp-fm32-6g9x, UBUNTU-CVE-2016-9385.