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Message-ID: <75q7866n-1r8s-1np8-sro1-o6268nn87n6@erqung.pbz>
Date: Thu, 28 Jan 2021 12:29:04 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Gaoning Pan <pgn@....edu.cn>
Subject: CVE-2021-20196 QEMU: block: fdc: null pointer dereference may lead
to guest crash
Hello,
A NULL pointer dereference issue was found in the Floopy disk emulator of
QEMU. It could occur while processing read/write ioport commands, if the
selected Floopy drive is not initialised with a block device. A privileged
guest user could use this flaw to crash the QEMU process on the host resulting
in DoS scenario.
Upstream patch:
---------------
-> https://lists.nongnu.org/archive/html/qemu-devel/2021-01/msg05986.html
This issue was reported by Gaoning Pan of Zhejiang University & Ant Security
Light-Year Lab.
Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
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