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Vigil@nce - QEMU: unreachable memory reading via address_space_translate
March 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker, who is privileged in a guest system, can force a read
at an invalid address in address_space_translate() of QEMU, in
order to trigger a denial of service.
– Impacted products: QEMU.
– Severity: 1/4.
– Creation date: 01/03/2016.
DESCRIPTION OF THE VULNERABILITY
The QEMU product can be compiled to use address_space_translate()
to map a memory address.
However, this function tries to read an unreachable memory area,
which triggers a fatal error.
An attacker, who is privileged in a guest system, can therefore
force a read at an invalid address in address_space_translate() of
QEMU, in order to trigger a denial of service.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/QEMU-unreachable-memory-reading-via-address-space-translate-19059
