CVE-2016-4439 Memory corruption in n/a
Local guest administrators can trigger an out-of-bounds write in QEMU's SCSI controller emulation, leading to host code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4439?
CVE-2016-4439 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 20 May 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.
Weakness: CWE-119
Which versions are affected by CVE-2016-4439?
It affects 3 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Qemu Qemu.
How do I fix CVE-2016-4439?
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-2016-4439 being exploited?
There is no known exploitation of CVE-2016-4439 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2016-4439, GHSA-7hvv-cj62-6f9j, UBUNTU-CVE-2016-4439.