CVE-2017-2615 Memory corruption in display
A privileged guest user can trigger an out-of-bounds access in QEMU's Cirrus VGA emulator to crash the host or execute arbitrary code.
- 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-2017-2615?
CVE-2017-2615 is a medium-severity memory corruption vulnerability in Citrix Xenserver, published on 2 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host.
Which versions are affected by CVE-2017-2615?
It affects 10 products.
Products include Citrix Xenserver, Debian Debian Linux, Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 4 more.
How do I fix CVE-2017-2615?
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-2017-2615 being exploited?
There is no known exploitation of CVE-2017-2615 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2017-2615, DEBIAN-CVE-2017-2615, GHSA-wj78-4p23-4g74, UBUNTU-CVE-2017-2615.