CVE-2017-10921 Memory corruption in n/a
Guest OS users can exploit Xen grant-table flaws to cause memory corruption, leading to host privilege escalation or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-10921?
CVE-2017-10921 is a critical memory corruption vulnerability in Xen Xen, published on 5 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2.
Weakness: CWE-119
Which versions are affected by CVE-2017-10921?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2017-10921?
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-2017-10921 being exploited?
There is no known exploitation of CVE-2017-10921 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as ALPINE-CVE-2017-10921, DEBIAN-CVE-2017-10921, GHSA-gf86-2wqg-v74w, UBUNTU-CVE-2017-10921.