CVE-2023-2829

Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled

At a glance

Severity: HIGH 7.5
EPSS: EPSS 0.88 % · percentile 59 (2026-10-27)
State: PUBLISHED
Published: 2023-06-21
Updated: 2025-02-13
Assigner: isc
NVD status: Modified

Description

A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record. This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.

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-2023-34280
GCVE · GCVE-0-2023-2829

CERT-FR advisories

CERTFR-2023-AVI-0479 — Multiples vulnérabilités dans BIND · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:* ≥ 9.16.8 ≤ 9.16.41
cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:* ≥ 9.18.11 ≤ 9.18.15
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*

Affected products

Product	Versions
ISC · BIND 9	affected 9.16.8-S1 ≤ 9.16.41-S1 ; affected 9.18.11-S1 ≤ 9.18.15-S1

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