CVE-2020-13791 QEMU: ati-vga: OOB access while reading PCI configuration may lead to DoS

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

  Hello,

An out-of-bounds access issue was found in the ati-vga emulator of the QEMU. 
It could occur while reading PCI configuration bytes via ati_mm_read routine, 
if the address sent by a guest is towards an end of the PCI configuration 
space. A guest user/process may use this flaw to crash the QEMU process 
resulting in DoS scenario.

Upstream patch
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00831.html

This issue was reported by Ren Ding and Hanqing Zhao of SSLab Georgia Tech and 
Yi Ren(CC'd)

'CVE-2020-13791' requeted via -> https://cveform.mitre.org/

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