Vigil@nce - QEMU: use after free via v9fs_path_copy
January 2019 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
Impacted products: QEMU, Ubuntu.
Severity: 2/4.
Consequences: administrator access/rights, privileged
access/rights, user access/rights, denial of service on server,
denial of service on service, denial of service on client.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 20/11/2018.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can force the usage of a freed
memory area via v9fs_path_copy() of QEMU, in order to trigger a
denial of service, and possibly to run code on the host system.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/QEMU-use-after-free-via-v9fs-path-copy-27833