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TI-2020-14305 Aliases CVE-2020-22217GHSA-88q4-8vpj-fqpg

Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function…

Priority MEDIUM 60CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00977 62nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:c-ares:c-ares:1.16.1:*:*:*:*:*:*:*1.16.1Vulnerablec-ares
cpe:2.3:a:c-ares:c-ares:1.17.0:*:*:*:*:*:*:*1.17.0Vulnerablec-ares
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:c-ares:c-ares:1.16.1:*:*:*:*:*:*:* Versions 1.16.1 Vulnerable ·c-ares
  • cpe:2.3:a:c-ares:c-ares:1.17.0:*:*:*:*:*:*:* Versions 1.17.0 Vulnerable ·c-ares
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2024:0578 Released 2024-01-30 · Red Hat rating Moderate
    c-ares security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) c-ares-1.13.0-6.el8_8.4, c-ares-devel-1.13.0-6.el8_8.4
  • RHSA-2024:0419 Released 2024-01-25 · Red Hat rating Moderate
    c-ares security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) c-ares-1.13.0-6.el8_6.3, c-ares-devel-1.13.0-6.el8_6.3
  • RHSA-2023:7207 Released 2023-11-14 · Red Hat rating Moderate
    c-ares security update
    • Red Hat Enterprise Linux BaseOS (v. 8) c-ares-1.13.0-9.el8_9.1, c-ares-devel-1.13.0-9.el8_9.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:7207
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:0419
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:0578
Not affected: 4 products
  • Red Hat Ansible Automation Platform 2
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-22217
  2. 2026-10-03 Alias added: GHSA-88q4-8vpj-fqpg

References

Exploit 1

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences