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Date: Thu, 25 Feb 2021 16:58:53 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Ruhr-University Bochum <bugs-syssec@....de>,
Cheolwoo Myung <cwmyung@....ac.kr>, Alexander Bulekov <alxndr@...edu>
Subject: CVE-2021-20257 QEMU: net: e1000: infinite loop while processing
transmit descriptors
Hello,
An infinite loop issue was found in the e1000 NIC emulator of the QEMU. It
occurs while processing transmit (tx) descriptors in process_tx_desc, if
various descriptor fields are initialised with invalid values. A guest may use
this flaw to consume cpu cycles on the host resulting in DoS scenario.
Upstream patch:
---------------
-> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html
'CVE-2021-20257' assigned by Red Hat Inc.
This issue was independently reported by Sergej Schumilo, Cornelius
Aschermann, Simon Werner of Ruhr-University Bochum; Cheolwoo Myung of Seoul
National University; And Alexander Bulekov (CC'd).
Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
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