oss-security - CVE-2017-12809 Qemu: ide: flushing of empty CDROM drives leads to NULL dereference

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Message-ID: <alpine.LFD.2.20.1708211648460.15179@wniryva>
Date: Mon, 21 Aug 2017 16:50:48 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Kieron Shorrock <kshorrock@...oaltonetworks.com>
Subject: CVE-2017-12809 Qemu: ide: flushing of empty CDROM drives leads to
 NULL dereference

   Hello,

Quick emulator built with the IDE disk and CD/DVD-ROM Emulator support is 
vulnerable to a null pointer dereference issue. It could occur while flushing 
an empty CDROM device drive.

A privileged user inside guest could use this flaw to crash the Qemu process 
resulting in DoS.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg01850.html

'CVE-2017-12809' assigned via -> https://cveform.mitre.org/

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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