CVE-2017-15595 Denial of service in n/a
A guest OS user can crash the Xen hypervisor or potentially gain privileges via crafted page-table stacking causing unbounded recursion.
- 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-2017-15595?
CVE-2017-15595 is a high-severity denial of service vulnerability in Xen Xen, published on 18 Oct 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in Xen through 4.9.x allowing x86 PV guest OS users to cause a denial of service (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking.
Weakness: CWE-400
Which versions are affected by CVE-2017-15595?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2017-15595?
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-2017-15595 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-15595 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Xen Xen
Sources
Also known as ALPINE-CVE-2017-15595, DEBIAN-CVE-2017-15595, GHSA-m9p9-mh4f-qxmq, UBUNTU-CVE-2017-15595.