oss-security - CVE-2020-28916 QEMU: e1000e: infinite loop scenario in case of null packet descriptor

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Message-ID: <37sqsnq6-99n6-o8np-sp65-q9po9s494510@erqung.pbz>
Date: Tue, 1 Dec 2020 14:55:22 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Cheol-woo Myung <330cjfdn@...il.com>
Subject: CVE-2020-28916 QEMU: e1000e: infinite loop scenario in case of null
 packet descriptor

   Hello,

An infinite loop issue was found in the e1000e device emulator in QEMU. The 
issue could occur while receiving packets via e1000e_write_packet_to_guest() 
routine, if the receive(RX) descriptor has NULL buffer address. A privileged 
guest user may use this flaw to induce a DoS scenario on the host.

Upstream patch:
---------------
   -> https://lists.nongnu.org/archive/html/qemu-devel/2020-11/msg03185.html

This issue was reported by Cheol-woo Myung.

CVE-2020-28916 assigned via -> https://cveform.mitre.org/

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D

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