CVE-2025-40775

DNS message with invalid TSIG causes an assertion failure

En bref

Sévérité: HIGH 7.5
EPSS: EPSS 15.30 % · centile 97 (2026-10-27)
État: PUBLISHED
Publiée: 2025-05-21
Mise à jour: 2025-05-23
Attribuée par: isc
Statut NVD: Deferred

Description

When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.

Scores

Version	Score	Vecteur	Évalué par
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)

Faiblesses (CWE)

CWE-232

Références européennes

ENISA EUVD · EUVD-2025-16006
GCVE · GCVE-0-2025-40775

Avis du CERT-FR

CERTFR-2025-AVI-0436 — Vulnérabilité dans ISC BIND · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
ISC · BIND 9	affected 9.20.0 ≤ 9.20.8 ; affected 9.21.0 ≤ 9.21.7

Références

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