CVE-2020-13362 QEMU: megasas: OOB read access due to invalid index leads to DoS

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

  Hello,

An OOB read access issue was found in the MegaRAID SAS 8708EM2 emulator of the 
QEMU. It occurs in 'megasas_lookup_frame' routine when 's->reply_queue_head' 
is set to a malicious value. A guest user/process may use this flaw to crash 
the QEMU process on the host resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg03463.html

This issue was reported by Ren Ding & Hanqing Zhao of SSLab Georgia Tech and 
also by Alexander Bulekov. CVE-2020-13362 requested via -> 
https://cveform.mitre.org/

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