Vigil@nce - QEMU: out-of-bounds memory reading via ide_atapi_cmd_reply_end
March 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: Debian, 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: 18/01/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can force a read at an invalid
address via ide_atapi_cmd_reply_end() of QEMU, in order to trigger
a denial of service, or to obtain sensitive information on the
host system.
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