> CVE-2025-49812 [HIGH]

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PUBLISHED
2025-07-10 17:15
MODIFIED
2025-07-29 15:09
CVSS_SCORE V3
7.4
EPSS (Prob. Exploit)
0.61%
Top 51.2%
DATA SOURCES:
NVD 🔗 2025-10-18 RED HAT 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-09-13 MSRC 🔗 2026-06-01

> DESCRIPTION

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade. Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.

> AFFECTED_PRODUCTS

Apache - HTTP Server
< 2.4.64

> CVSS V3 METRICS

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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
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
High (H)
Conditions spécifiques doivent être réunies 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
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: httpd:2.4 security update
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support. Red Hat Product Security has rated this update as having a security impa...
Red Hat Security Advisory: httpd:2.4 security update
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support. Red Hat Product Security has rated this update as having a security impa...
Red Hat Security Advisory: httpd:2.4 security update
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of M...
Red Hat Security Advisory: httpd:2.4 security update
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A...
Red Hat Security Advisory: httpd:2.4 security update
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scor...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CV...
Red Hat Security Advisory: httpd security update
An update for httpd 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 impact of Moderate. A...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVS...
Red Hat Security Advisory: httpd security update
An update for httpd 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 Moderate. A Common Vulner...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnera...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnera...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Moderate. A Comm...
Red Hat Security Advisory: httpd security update
An update for httpd is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Moderate. A Comm...
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
Red Hat JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 1 is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability...
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
Red Hat JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 1 is now available. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability...

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Apache HTTP Server: mod_ssl TLS upgrade attack

AFFECTED PACKAGES:
Unknown / Unknown
1 versions affected
ALIASES:
BIT-apache-2025-49812

> HISTORIQUE DES MODIFICATIONS

Première apparition
10/07/2025 17:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 15:06
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 18/10/2025 12:10
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 18/10/2025 12:10
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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