CVE-2017-8380 Qemu: scsi: megasas: out-of-bounds read in megasas_mmio_write

[P J P <ppandit () redhat com>]

  Hello,

Quick Emulator(Qemu) built with the MegaRAID SAS 8708EM2 Host Bus Adapter 
emulation support is vulnerable to an out-of-bounds read access issue. It 
could occur while performing a MMIO write operation.

A privileged user inside guest could use this flaw to read host memory leading 
to potentially crash the Qemu process on the host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-04/msg04147.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1446577

This issue was reported by YY Z(researcher)

'CVE-2017-8380' assigned via -> http://cveform.mitre.org/

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
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