News
Vigil@nce - QEMU: buffer overflow via virtio-gpu-3d
February 2017 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker, inside a guest system, can generate a buffer overflow
via virtio-gpu-3d of QEMU, in order to trigger a denial of service
against the host system.
Impacted products: Fedora, QEMU.
Severity: 2/4.
Creation date: 20/12/2016.
DESCRIPTION OF THE VULNERABILITY
The Qemu product manages commands exported to guest userspace
process.
However, for the command VIRTIO_GPU_CMD_GET_CAPSET, QEMU accepts a
nul buffer size for the command response data. In this cas, an
overflow occurs.
An attacker, inside a guest system, can therefore generate a
buffer overflow via virtio-gpu-3d of QEMU, in order to trigger a
denial of service against the host system.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/QEMU-buffer-overflow-via-virtio-gpu-3d-21428
