> CVE-2024-9666 [MEDIUM]

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PUBLISHED
2024-11-25 08:15
MODIFIED
2024-11-25 08:15
CVSS_SCORE V3
4.7
EPSS (Prob. Exploit)
0.40%
Top 65.2%
DATA SOURCES:
NVD 🔗 2025-10-18 RED HAT 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-11 OSV 🔗 2026-11-08

> DESCRIPTION

A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service. The attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.

> AFFECTED_PRODUCTS

Red Hat - Red Hat build of Keycloak 26.0
Red Hat - Red Hat build of Keycloak 24
Red Hat - Red Hat build of Keycloak 24.0.9
Red Hat - Red Hat build of Keycloak 26.0.6

> CVSS V3 METRICS

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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
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: Red Hat build of Keycloak 26.0.6 Update
New Red Hat build of Keycloak 26.0.6 packages with security impact Important are available from the Customer Portal
Red Hat Security Advisory: Red Hat build of Keycloak 26.0.6 Images Update
New images with security impact Important are available for Red Hat build of Keycloak 26.0.6 and Red Hat build of Keycloak 26.0.6 Operator, running on OpenShift Container Platform
Red Hat Security Advisory: Red Hat build of Keycloak 24.0.9 Update
New Red Hat build of Keycloak 24.0.9 packages with security impact Important are available from the Customer Portal
Red Hat Security Advisory: Red Hat build of Keycloak 24.0.9 Images Update
New images with security impact Important are available for Red Hat build of Keycloak 24.0.9 and Red Hat build of Keycloak 24.0.9 Operator, running on OpenShift Container Platform.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Low

> GITHUB SECURITY ADVISORY

GHSA-jgwc-jh89-rpgq MODERATE

Keycloak proxy header handling Denial-of-Service (DoS) vulnerability

AFFECTED PACKAGES:
MAVEN / org.keycloak:keycloak-quarkus-server
>= 25.0.0, < 26.0.6
Fixed in: 26.0.6
MAVEN / org.keycloak:keycloak-quarkus-server
< 24.0.9

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Org.keycloak/keycloak-quarkus-server: keycloak proxy header handling denial-of-service (dos) vulnerability

AFFECTED PACKAGES:
Unknown / Unknown
13 versions affected
ALIASES:
GHSA-jgwc-jh89-rpgq

> HISTORIQUE DES MODIFICATIONS

Première apparition
25/11/2024 08:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 14:57
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 18/10/2025 12:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Low", "severity_scale": null }
📊 ENRICHISSEMENT 18/10/2025 12:30
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 1 year ago
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