CVE-2017-10923 Denial of service in n/a
Guest OS users can crash the Xen hypervisor by sending an SGI with an invalid vCPU array index, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-10923?
CVE-2017-10923 is a medium-severity denial of service vulnerability in Xen Xen, published on 5 Jul 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service (hypervisor crash), aka XSA-225.
Weakness: CWE-20
Which versions are affected by CVE-2017-10923?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2017-10923?
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-2017-10923 being exploited?
There is no known exploitation of CVE-2017-10923 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as ALPINE-CVE-2017-10923, DEBIAN-CVE-2017-10923, GHSA-83mw-xpgw-63qr, UBUNTU-CVE-2017-10923.