Vigil@nce - QEMU: use after free via mptsas_free_request
April 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: QEMU.
Consequences: administrator access/rights, denial of service on server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 05/02/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can force the usage of a freed memory area via mptsas_free_request() of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
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