CVE-2020-1711 QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server

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

  Hello,

An out-of-bounds heap buffer access issue was found in the way iSCSI Block 
driver in QEMU handled response coming from an iSCSI server, while checking 
status of a Logical Address Block (LBA) in iscsi_co_block_status() routine.

A remote user could use this flaw to crash the QEMU process resulting in DoS 
OR potentially execute arbitrary code with privileges of the QEMU process on 
the host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg05535.html

This issue was reported by Felipe Franciosi, Raphael Norwitz and Peter 
Turschmid of nutanix.com.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D