> CVE-2023-50387 [HIGH]

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PUBLISHED
2024-02-14 16:15
MODIFIED
2025-05-12 15:15
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
99.99%
Top 0.0%
⚡ EPSS ÉLEVÉ (100.0%)
DATA SOURCES:
NVD 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-11-08 OSV 🔗 2026-11-08

> DESCRIPTION

Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.

> AFFECTED_PRODUCTS

Red Hat - Enterprise Linux
Version: 6.0
Red Hat - Enterprise Linux
Version: 7.0
Red Hat - Enterprise Linux
Version: 8.0
Red Hat - Enterprise Linux
Version: 9.0
Isc - Bind
>= 9.0.0 <= 9.16.46
Isc - Bind
>= 9.18.0 <= 9.18.22
Isc - Bind
>= 9.19.0 <= 9.19.20
Fedoraproject - Fedora
Version: 39
Thekelleys - Dnsmasq
< 2.90
Powerdns - Recursor
>= 4.8.0 < 4.8.6
Powerdns - Recursor
>= 4.9.0 < 4.9.3
Powerdns - Recursor
>= 5.0.0 < 5.0.2
Microsoft - Windows Server 2008
Version: r2
Nlnetlabs - Unbound
< 1.19.1
Microsoft - Windows Server 2012
Version: r2
Nic - Knot Resolver
< 5.71

> CVSS V3 METRICS

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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: bind and bind-dyndb-ldap security update
An update for bind and bind-dyndb-ldap is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION. Red Hat Product Security has rated this update as having a security imp...
Red Hat Security Advisory: unbound security update
An update for unbound is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vul...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

AFFECTED PACKAGES:
Unknown / Unknown
131 versions affected
Unknown / Unknown
11 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/02/2024 16:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 14:46
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 1 Dernière mise à jour: 1 year ago
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