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Date: Fri, 5 Feb 2021 12:45:04 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Cheolwoo Myung <cwmyung@....ac.kr>
Subject: CVE-2021-3392 QEMU: scsi: mptsas: use-after-free while processing
io requests
Hello,
A use-after-free issue was found in the Megaraid emulator of the QEMU. It
occurs while processing SCSI i/o requests because in case of an error
mptsas_free_request() does not dequeue request object 'req' from a pending
requests' queue. Which later gets processed resulting in the said
use-after-free issue. A privileged guest user 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/2021-02/msg00488.html
This issue was reported by Cheolwoo Myung of Seoul National University.
Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
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