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Vigil@nce - QEMU: NULL pointer dereference via ide_cancel_dma_sync

October 2020 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2

SYNTHESIS OF THE VULNERABILITY

 Impacted products: QEMU.
 Severity: 1/4.
 Consequences: denial of service on server, denial of service on
service.
 Provenance: user shell.
 Confidence: confirmed by the editor (5/5).
 Creation date: 29/09/2020.

DESCRIPTION OF THE VULNERABILITY

An attacker, inside a guest system, can force a NULL pointer to be
dereferenced via ide_cancel_dma_sync() of QEMU, in order to
trigger a denial of service on the host system.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/QEMU-NULL-pointer-dereference-via-ide-cancel-dma-sync-33449


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