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Vigil@nce - QEMU: memory leak via ehci_process_itd

October 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker, inside a guest system, can create a memory leak via
ehci_process_itd() of QEMU, in order to trigger a denial of
service on the host system.

 Impacted products: Fedora, QEMU.
 Severity: 1/4.
 Creation date: 07/10/2016.

DESCRIPTION OF THE VULNERABILITY

The QEMU product emulates USB EHCI (Enhanced Host Controller
Interface).

However, the memory allocated to process ehci_process_itd() is
never freed.

An attacker, inside a guest system, can therefore create a memory
leak via ehci_process_itd() of QEMU, in order to trigger a denial
of service on the host system.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/QEMU-memory-leak-via-ehci-process-itd-20803


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