CVE-2025-9784
Vulnérabilité élevée
CVSS 7.5 · Élevée
EPSS 2.3%
•Versions : 0:2.3.23-1.SP3_redhat_00001.1.el9eap, 0:4.0.2-1.Final_redhat_00001.1.el8eap, 0:2.6.6-1.Final_redhat_00001.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el9eap, 0:4.0.6-1.redhat_00001.1.el8eap, 0:2.0.41-8.SP9_redhat_00001.1.el7eap, 0:4.0.2-1.Final_redhat_00001.1.el9eap, 0:4.0.10-1.redhat_00001.1.el9eap, 0, 0:2.5.0-1.redhat_00001.1.el9eap, <*, 0:801.3.0-1.GA_redhat_00001.1.el8eap, 0:33.0.0-2.jre_redhat_00003.1.el8eap, 0:8.1.1-4.GA_redhat_00007.1.el8eap, 0:18.0.20-1.redhat_00001.1.el9sso, 0:2.6.6-1.Final_redhat_00001.1.el9eap, 0:7.4.24-4.GA_redhat_00002.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el8eap, 0:2.2.39-1.Final_redhat_00001.1.el9eap, <2.2.38.Final, 0:801.3.0-1.GA_redhat_00001.1.el9eap, 0:1.0.1-3.redhat_00003.1.el9eap, 0:2.5.0-1.redhat_00001.1.el8eap, 0:1.83.0-1.redhat_00001.1.el9eap, 0:1.4.18-21.SP19_redhat_00001.1.ep7.el7, 0:2.2.39-1.Final_redhat_00001.1.el7eap, 0:7.4.24-4.GA_redhat_00002.1.el9eap, 0:2.2.39-1.Final_redhat_00001.1.el8eap, 0:1.82.0-1.redhat_00001.1.el8eap, 0:2.0.2-1.Final_redhat_00001.1.el8eap, 0:1.0.0-3.redhat_00009.1.el8eap, 0:6.6.36-1.Final_redhat_00001.1.el9eap, 0:1.83.0-1.redhat_00001.1.el8eap, 0:2.3.23-1.SP3_redhat_00001.1.el8eap, 0:5.0.12-1.Final_redhat_00001.1.el8eap, 0:5.0.12-1.Final_redhat_00001.1.el9eap, 0:4.0.6-1.redhat_00001.1.el9eap, 2.2.39.Final-redhat-00001, 0:1.0.0-3.redhat_00009.1.el9eap, 0:8.1.3-4.GA_redhat_00006.1.el9eap, 2.3.20.SP4-redhat-00001, 0:7.4.24-4.GA_redhat_00002.1.el7eap, 0:4.0.10-1.redhat_00001.1.el8eap, 0:18.0.20-1.redhat_00001.1.el7sso, 0:6.6.36-1.Final_redhat_00001.1.el8eap, 7.6-85, 0:8.1.3-4.GA_redhat_00006.1.el8eap, 0:1.0.1-3.redhat_00003.1.el8eap, 0:18.0.20-1.redhat_00001.1.el8sso, 0:33.0.0-2.jre_redhat_00003.1.el9eap, 0:2.0.2-1.Final_redhat_00001.1.el9eap, 0:8.1.1-4.GA_redhat_00007.1.el9eap, 0:1.82.0-1.redhat_00001.1.el9eap
Description
A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).
Gravité et risque d'exploitation
CVE-2025-9784 obtient un score CVSS de 7.5/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 2.33 %, ce qui la place devant 83.2 % des CVE référencées.
Que faire ?
- Vérifiez si le produit concerné (versions 0:2.3.23-1.SP3_redhat_00001.1.el9eap, 0:4.0.2-1.Final_redhat_00001.1.el8eap, 0:2.6.6-1.Final_redhat_00001.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el9eap, 0:4.0.6-1.redhat_00001.1.el8eap, 0:2.0.41-8.SP9_redhat_00001.1.el7eap, 0:4.0.2-1.Final_redhat_00001.1.el9eap, 0:4.0.10-1.redhat_00001.1.el9eap, 0, 0:2.5.0-1.redhat_00001.1.el9eap, <*, 0:801.3.0-1.GA_redhat_00001.1.el8eap, 0:33.0.0-2.jre_redhat_00003.1.el8eap, 0:8.1.1-4.GA_redhat_00007.1.el8eap, 0:18.0.20-1.redhat_00001.1.el9sso, 0:2.6.6-1.Final_redhat_00001.1.el9eap, 0:7.4.24-4.GA_redhat_00002.1.el8eap, 0:2.3.20-2.SP4_redhat_00001.1.el8eap, 0:2.2.39-1.Final_redhat_00001.1.el9eap, <2.2.38.Final, 0:801.3.0-1.GA_redhat_00001.1.el9eap, 0:1.0.1-3.redhat_00003.1.el9eap, 0:2.5.0-1.redhat_00001.1.el8eap, 0:1.83.0-1.redhat_00001.1.el9eap, 0:1.4.18-21.SP19_redhat_00001.1.ep7.el7, 0:2.2.39-1.Final_redhat_00001.1.el7eap, 0:7.4.24-4.GA_redhat_00002.1.el9eap, 0:2.2.39-1.Final_redhat_00001.1.el8eap, 0:1.82.0-1.redhat_00001.1.el8eap, 0:2.0.2-1.Final_redhat_00001.1.el8eap, 0:1.0.0-3.redhat_00009.1.el8eap, 0:6.6.36-1.Final_redhat_00001.1.el9eap, 0:1.83.0-1.redhat_00001.1.el8eap, 0:2.3.23-1.SP3_redhat_00001.1.el8eap, 0:5.0.12-1.Final_redhat_00001.1.el8eap, 0:5.0.12-1.Final_redhat_00001.1.el9eap, 0:4.0.6-1.redhat_00001.1.el9eap, 2.2.39.Final-redhat-00001, 0:1.0.0-3.redhat_00009.1.el9eap, 0:8.1.3-4.GA_redhat_00006.1.el9eap, 2.3.20.SP4-redhat-00001, 0:7.4.24-4.GA_redhat_00002.1.el7eap, 0:4.0.10-1.redhat_00001.1.el8eap, 0:18.0.20-1.redhat_00001.1.el7sso, 0:6.6.36-1.Final_redhat_00001.1.el8eap, 7.6-85, 0:8.1.3-4.GA_redhat_00006.1.el8eap, 0:1.0.1-3.redhat_00003.1.el8eap, 0:18.0.20-1.redhat_00001.1.el8sso, 0:33.0.0-2.jre_redhat_00003.1.el9eap, 0:2.0.2-1.Final_redhat_00001.1.el9eap, 0:8.1.1-4.GA_redhat_00007.1.el9eap, 0:1.82.0-1.redhat_00001.1.el9eap) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://access.redhat.com/errata/RHSA-2025:23143
- https://access.redhat.com/errata/RHSA-2026:0383
- https://access.redhat.com/errata/RHSA-2026:0384
- https://access.redhat.com/errata/RHSA-2026:0386
- https://access.redhat.com/errata/RHSA-2026:33371
- https://access.redhat.com/errata/RHSA-2026:33372
- https://access.redhat.com/errata/RHSA-2026:3889
- https://access.redhat.com/errata/RHSA-2026:3891
- https://access.redhat.com/errata/RHSA-2026:3892
- https://access.redhat.com/errata/RHSA-2026:4915
- https://access.redhat.com/errata/RHSA-2026:4916
- https://access.redhat.com/errata/RHSA-2026:4917
- https://access.redhat.com/errata/RHSA-2026:4924
- https://access.redhat.com/errata/RHSA-2026:76128
- https://access.redhat.com/errata/RHSA-2026:76129
- https://access.redhat.com/errata/RHSA-2026:76130
- https://access.redhat.com/errata/RHSA-2026:76132
- https://access.redhat.com/errata/RHSA-2026:76134
- https://access.redhat.com/security/cve/CVE-2025-9784
- https://bugzilla.redhat.com/show_bug.cgi?id=2392306
- https://github.com/undertow-io/undertow/pull/1778
- https://github.com/undertow-io/undertow/releases/tag/2.2.38.Final
- https://issues.redhat.com/browse/UNDERTOW-2598
- https://kb.cert.org/vuls/id/767506