CVE-2023-4408

Parsing large DNS messages may cause excessive CPU load

HIGH 7.5

At a glance

Source: NVD
EPSS: EPSS 1.39 % · percentile 72 (2026-10-28)
State: PUBLISHED
Published: 2024-02-13 14:04 UTC
Updated: 2025-03-14 16:16 UTC
Assigner: isc
NVD status: Modified

Description

The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers. This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Weaknesses (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	isc
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · security-officer@isc.org (Secondary)

European references

ENISA EUVD · EUVD-2023-54271
GCVE · GCVE-0-2023-4408

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-0018 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
CERTFR-2024-AVI-0627 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2024-AVI-0506 — Multiples vulnérabilités dans Juniper Secure Analytics · cert.ssi.gouv.fr
CERTFR-2024-AVI-0470 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2024-AVI-0122 — Multiples vulnérabilités dans Bind · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:netapp:ontap:9.14.1:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap:9.15.1:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.0.0 ≤ 9.16.45
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.18.0 ≤ 9.18.21
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* ≥ 9.19.0 ≤ 9.19.19
cpe:2.3:a:isc:bind:9.9.3: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:9.16.12:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.14: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:a:isc:bind:9.16.36:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.16.43:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.18.0:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.18.11:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.18.18:s1:*:*:supported_preview:*:*:*

Affected products

Product	Versions
ISC · BIND 9	affected 9.0.0 ≤ 9.16.45 ; affected 9.18.0 ≤ 9.18.21 ; affected 9.19.0 ≤ 9.19.19 ; affected 9.9.3-S1 ≤ 9.11.37-S1 ; affected 9.16.8-S1 ≤ 9.16.45-S1 ; affected 9.18.11-S1 ≤ 9.18.21-S1

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