oss-security - QEMU: ESP security fixes

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Message-ID: <CAA8xKjVxi7xuZ-SFHGa63jFv9G2t4tEwVZ7qMaJP=ssynYGvKA@mail.gmail.com>
Date: Fri, 16 Apr 2021 15:28:15 +0200
From: Mauro Matteo Cascella <mcascell@...hat.com>
To: oss-security@...ts.openwall.com
Cc: Cheolwoo Myung <cwmyung@....ac.kr>, Alexander Bulekov <alxndr@...edu>
Subject: QEMU: ESP security fixes

Hello,

Several issues, including assertion failures, NULL pointer
dereferences, and memory corruption flaws were identified in the
am53c974 (ESP) device emulation of QEMU. A privileged guest user could
use these flaws to crash the QEMU process on the host, resulting in a
denial of service. Potential code execution with the privileges of the
QEMU process cannot be ruled out.

These issues are going to be fixed in the coming 6.0 release, see
https://wiki.qemu.org/Planning/6.0#Fixed_in_rc3.

Patch series:
https://lists.gnu.org/archive/html/qemu-devel/2021-04/msg01000.html

Upstream commits:
https://git.qemu.org/?p=qemu.git;a=commit;h=0db895361b
https://git.qemu.org/?p=qemu.git;a=commit;h=e392255766
https://git.qemu.org/?p=qemu.git;a=commit;h=e5455b8c1c
https://git.qemu.org/?p=qemu.git;a=commit;h=c5fef9112b
https://git.qemu.org/?p=qemu.git;a=commit;h=7b320a8e67
https://git.qemu.org/?p=qemu.git;a=commit;h=9954575173
https://git.qemu.org/?p=qemu.git;a=commit;h=fa7505c154
https://git.qemu.org/?p=qemu.git;a=commit;h=fbc6510e33
https://git.qemu.org/?p=qemu.git;a=commit;h=0ebb5fd805
https://git.qemu.org/?p=qemu.git;a=commit;h=324c880989
https://git.qemu.org/?p=qemu.git;a=commit;h=607206948c

Acknowledgements: Cheolwoo Myung and Alexander Bulekov (cc'd).
CVE-2020-35504, CVE-2020-35505, CVE-2020-35506 assigned by Red Hat, Inc.

Best regards.
-- 
Mauro Matteo Cascella
Red Hat Product Security
PGP-Key ID: BB3410B0

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