Vigil@nce - QEMU: out-of-bounds memory reading via ati-vga ati_2d_blt
January 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
Impacted products: QEMU, Ubuntu.
Severity: 2/4.
Consequences: data reading, denial of service on server, denial of
service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 03/11/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can force a read at an invalid
address via ati-vga ati_2d_blt() of QEMU, in order to trigger a
denial of service, or to obtain sensitive information on the host
system.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/QEMU-out-of-bounds-memory-reading-via-ati-vga-ati-2d-blt-33775