CVE-2016-9386 Privilege escalation in n/a
Local HVM guest users can gain privileges due to improper handling of NULL segments in the Xen x86 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-2016-9386?
CVE-2016-9386 is a high-severity 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 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.
Weakness: CWE-264
Which versions are affected by CVE-2016-9386?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2016-9386?
Apply the vendor's patch.
Is CVE-2016-9386 being exploited?
There is no known exploitation of CVE-2016-9386 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2016-9386, DEBIAN-CVE-2016-9386, GHSA-5mmc-9chw-pm3p, UBUNTU-CVE-2016-9386.