Vulnerability CVE-2021-20257: Information

Description

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Severity: MEDIUM (6.5) Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

URL: https://nvd.nist.gov/vuln/detail/CVE-2021-20257
Published: March 16, 2022
Modified: Feb. 13, 2023
Error type identifier: CWE-835

Fixed packages

Package name
Branch
Fixed in version
Version from repository
Errata ID
Task #
State
pve-qemup107.1.0-alt47.2.0-alt4ALT-PU-2022-3390-1307814Fixed
pve-qemuc10f17.1.0-alt47.2.0-alt3ALT-PU-2022-3390-1307814Fixed
qemusisyphus6.1.0-alt28.2.3-alt1ALT-PU-2021-3286-1289853Fixed
qemusisyphus_e2k7.2.0-alt3.E2K.37.2.0-alt3.E2K.4ALT-PU-2024-1953-1-Fixed
qemup106.1.0-alt28.2.2-alt0.p10.1ALT-PU-2021-3363-1289854Fixed
qemup10_e2k7.2.0-alt3.E2K.07.2.0-alt3.E2K.3ALT-PU-2023-6766-1-Fixed
qemuc10f16.1.0-alt28.2.2-alt0.p10.1ALT-PU-2021-3363-1289854Fixed
qemup116.1.0-alt28.2.3-alt1ALT-PU-2021-3286-1289853Fixed

References to Advisories, Solutions, and Tools

Hyperlink
Resource
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html
  • Mailing List
  • Patch
  • Vendor Advisory
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8
  • Patch
  • Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1930087
  • Issue Tracking
  • Patch
  • Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/2
  • Mailing List
  • Patch
  • Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0003/
  • Third Party Advisory
GLSA-202208-27
  • Third Party Advisory
[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update
  • Mailing List
  • Third Party Advisory

    1. Configuration 1

      cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
      End excliding
      6.2.0

      Configuration 2

      cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

      Configuration 3

      cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
      cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
      cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
      cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
      cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*
      cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*
      cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*

      Configuration 4

      cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*
      Running on/with:
      cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
      Running on/with:
      cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
      Running on/with:
      cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*

      Configuration 5

      cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
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