CVE-2016-9383 Memory corruption in n/a
Local guest users can execute arbitrary code on the host or cause crashes due to broken bit test instruction emulation in Xen.
- 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-2016-9383?
CVE-2016-9383 is a high-severity memory corruption 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
Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.
Weakness: CWE-20
Which versions are affected by CVE-2016-9383?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2016-9383?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2016-9383 being exploited?
There is no known exploitation of CVE-2016-9383 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2016-9383, DEBIAN-CVE-2016-9383, GHSA-qw22-r72h-rf56, UBUNTU-CVE-2016-9383.