CVE-2020-22217: Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.

Overview

Severity
Medium (CVSS 5.9)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Status
Not Exploited
Patch Tuesday
2023-Aug
Released
2023-09-04
Last Updated
2026-02-18
EPSS Score
0.11% (percentile: 30.2%)

FAQ

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.

Affected Products (5)

Other

  • 19814-17086
  • 19666-17084
  • 19187-16823
  • 20279-17084
  • 17667-17084

Revision History

  • 2023-09-04: Information published.
  • 2024-06-30: Information published.
  • 2025-02-03: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-04: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-05: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-07: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-08: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-09: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-10: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-11: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-12: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-13: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-14: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-15: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-16: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-17: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-18: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-19: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-20: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-21: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-22: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-23: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-24: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-25: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-26: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-27: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-02-28: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-01: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-02: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-03: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-04: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-05: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-06: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-08: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-09: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-10: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-11: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-12: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-13: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-14: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-15: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-16: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-17: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-18: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-19: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-20: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-21: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-22: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-23: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-24: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-25: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-26: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-27: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-28: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-29: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-30: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-03-31: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-01: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-03: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-04: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-05: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-06: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-07: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-08: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-09: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-11: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-12: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-13: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-14: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-15: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-16: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-17: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-18: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-19: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-20: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-21: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-22: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-23: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-24: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-25: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-26: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-28: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-29: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-04-30: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-01: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-02: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-03: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-04: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-05: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-06: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-07: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-08: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-09: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-10: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-11: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-12: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-13: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-14: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-15: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-16: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-17: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-18: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-19: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-20: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-21: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-22: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-23: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-24: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-25: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-26: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2025-05-27: Added grpc to Azure Linux 3.0 Added python-gevent to CBL-Mariner 2.0
  • 2026-02-18: Information published.