Vulnpedia
← All CVEs

CVE-2020-22217

MEDIUM 5.9 ALL-YEARS

Published 2023-08-22 · Last modified 2024-10-03 · mitre · NVD: Modified

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.

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

1.0%chance of exploitation in 30 days · 62nd percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation poc, automatable no

Impact if exploited

5.9CVSS 3.1 · MEDIUM · NVD

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors C Ares Debian

Products C Ares Debian Linux

Weakness (CWE)

  • CWE-125: Out-of-bounds read

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 138 vendor product statements; 106 omitted. Read the full vendor advisory.

  • c-ares-0:1.13.0-6.el8_6.3.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6.3?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-0:1.13.0-6.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6.3?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debuginfo-0:1.13.0-6.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6.3?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debugsource-0:1.13.0-6.el8_6.3.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6.3?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-devel-0:1.13.0-6.el8_6.3.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6.3?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-0:1.13.0-6.el8_8.4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8.4?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debuginfo-0:1.13.0-6.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8.4?arch=ppc64le

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debugsource-0:1.13.0-6.el8_8.4.i686 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8.4?arch=i686

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-devel-0:1.13.0-6.el8_8.4.i686 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8.4?arch=i686

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-0:1.13.0-9.el8_9.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_9.1?arch=i686

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debuginfo-0:1.13.0-9.el8_9.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_9.1?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debuginfo-0:1.13.0-9.el8_9.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_9.1?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-debugsource-0:1.13.0-9.el8_9.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_9.1?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-devel-0:1.13.0-9.el8_9.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_9.1?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-devel as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/c-ares-devel

    • no fix planned: Out of support scope
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares.src as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/c-ares?arch=src

    • no fix planned: Out of support scope
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/c-ares

    • no fix planned: Out of support scope
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/c-ares-devel

    • no fix planned: Out of support scope
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • c-ares.src as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/c-ares?arch=src

    • no fix planned: Out of support scope
    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • ansible-automation-platform-25/ee-supported-rhel9 as a component of Red Hat Ansible Automation Platform 2 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:oci/ee-supported-rhel9?repository_url=registry.redhat.io/ansible-automation-platform-24/ee-supported-rhel9

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs-docs (nodejs:20) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:20

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs-libs (nodejs:20) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:20

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs-nodemon (nodejs:18) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs-nodemon?rpmmod=nodejs:18

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs-packaging.src (nodejs:18) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs-packaging?arch=src&rpmmod=nodejs:18

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs.src (nodejs:18) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs?arch=src&rpmmod=nodejs:18

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • npm (nodejs:16) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/npm?rpmmod=nodejs:16

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • v8-13.6-devel (nodejs:16) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/v8-13.6-devel?rpmmod=nodejs:16

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs-full-i18n (nodejs:20) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs-full-i18n?rpmmod=nodejs:20

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • nodejs.src (nodejs:20) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs?arch=src&rpmmod=nodejs:20

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • npm (nodejs:20) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/npm?rpmmod=nodejs:20

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00
  • rh-nodejs14-npm as a component of Red Hat Software Collections · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/rh-nodejs14-npm

    Red Hat · CVE-2020-22217 · Updated 2026-08-06T19:15:20+00:00

Known Affected Software Configurations

VendorProductVersion range
C AresC Ares1.16.1
C AresC Ares1.17.0
DebianDebian Linux10.0

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS