CVE-2021-20257 QEMU: net: e1000: infinite loop while processing transmit descriptors

                							

                <!--X-Body-Begin-->
<!--X-User-Header-->

oss-sec
mailing list archives
<!--X-User-Header-End-->
<!--X-TopPNI-->

By Date

By Thread

</form>

<!--X-TopPNI-End-->
<!--X-MsgBody-->
<!--X-Subject-Header-Begin-->
CVE-2021-20257 QEMU: net: e1000: infinite loop while processing transmit descriptors

<!--X-Subject-Header-End-->
<!--X-Head-of-Message-->

From: P J P &lt;ppandit () redhat com&gt;

Date: Thu, 25 Feb 2021 16:58:53 +0530 (IST)

<!--X-Head-of-Message-End-->
<!--X-Head-Body-Sep-Begin-->

<!--X-Head-Body-Sep-End-->
<!--X-Body-of-Message-->
  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:
---------------
  -&gt; 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

<!--X-Body-of-Message-End-->
<!--X-MsgBody-End-->
<!--X-Follow-Ups-->

<!--X-Follow-Ups-End-->
<!--X-References-->
<!--X-References-End-->
<!--X-BotPNI-->

By Date

By Thread

Current thread:

CVE-2021-20257 QEMU: net: e1000: infinite loop while processing transmit descriptors P J P (Feb 25)

<!--X-BotPNI-End-->
<!--X-User-Footer-->
<!--X-User-Footer-End-->