oss-security - CVE-2021-3416 QEMU: net: infinite loop in loopback mode may lead tostack overflow

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <5s13663-1p72-s775-1762-6sp1qr114s39@erqung.pbz>
Date: Fri, 26 Feb 2021 20:16:15 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2021-3416 QEMU: net: infinite loop in loopback mode may lead
 tostack overflow

   Hello,

A potential stack overflow via infinite loop issue was found in various NIC 
emulators of QEMU. The said issue occurs in loopback mode of a NIC wherein 
reentrant DMA checks may get bypassed. A guest user/process may use this flaw 
to consume cpu cycles or crash the QEMU process on the host resulting in DoS 
scenario.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html
   -> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07484.html

'CVE-2021-3416' assigned via Red Hat Inc.

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

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.