CVE-2022-2795

Processing large delegations may severely degrade resolver performance

At a glance

Severity: MEDIUM 5.3
EPSS: EPSS 2.29 % · percentile 83 (2026-10-27)
State: PUBLISHED
Published: 2022-09-21
Updated: 2024-11-29
Assigner: isc
NVD status: Modified

Description

By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	isc
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	NVD · security-officer@isc.org (Secondary)
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2022-35036
GCVE · GCVE-0-2022-2795

CERT-FR advisories

CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2024-AVI-0297 — Multiples vulnérabilités dans Juniper · cert.ssi.gouv.fr
CERTFR-2024-AVI-0027 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
CERTFR-2023-AVI-0537 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
CERTFR-2023-AVI-0276 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2022-AVI-848 — Multiples vulnérabilités dans Bind · cert.ssi.gouv.fr
CERTFR-2022-AVI-1059 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.0.0 < 9.16.33
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.18.0 < 9.18.7
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.19.0 < 9.19.5
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.14-s1:*:*:*:preview:*:*:*
cpe:2.3:a:isc:bind:9.11.19-s1:*:*:*:preview:*:*:*
cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.11.37:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

Affected products

Product	Versions
ISC · BIND9	affected Open Source Branches 9.0 through 9.16 9.0.0 through versions before 9.16.33 ; affected Open Source Branch 9.18 9.18.0 through versions before 9.18.7 ; affected Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions up to and including 9.11.37-S1 ; affected Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1 ; affected Development Branch 9.19 9.19.0 through versions before 9.19.5

Product

Versions

ISC · BIND9

affected Open Source Branches 9.0 through 9.16 9.0.0 through versions before 9.16.33 ; affected Open Source Branch 9.18 9.18.0 through versions before 9.18.7 ; affected Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions up to and including 9.11.37-S1 ; affected Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1 ; affected Development Branch 9.19 9.19.0 through versions before 9.19.5

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD