CVE-2017-12134 Memory corruption in n/a
Local guest users can corrupt block device data to leak memory, cause DoS, or escalate privileges to the host OS via incorrect IO merge calculations.
- 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-2017-12134?
CVE-2017-12134 is a high-severity memory corruption vulnerability in Citrix Xenserver, published on 24 Aug 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
Weakness: CWE-682
Which versions are affected by CVE-2017-12134?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2017-12134?
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-2017-12134 being exploited?
There is no known exploitation of CVE-2017-12134 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as DEBIAN-CVE-2017-12134, GHSA-c46p-g2h9-xcvx, UBUNTU-CVE-2017-12134.