CVE-2025-9784

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).
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:redhat:build_of_apache_camel_for_spring_boot:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:fuse:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:process_automation:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

History

06 Oct 2026, 17:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:76128 -

06 Oct 2026, 12:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:76129 -
  • () https://access.redhat.com/errata/RHSA-2026:76130 -

06 Oct 2026, 00:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:76132 -
  • () https://access.redhat.com/errata/RHSA-2026:76134 -

26 Sep 2026, 00:10

Type Values Removed Values Added
Summary
  • (es) Se encontró una vulnerabilidad en Undertow donde solicitudes de cliente malformadas pueden desencadenar restablecimientos de flujo del lado del servidor sin activar contadores de abuso. Este problema, conocido como el ataque “MadeYouReset”, permite a clientes maliciosos inducir una carga de trabajo excesiva del servidor al causar repetidamente abortos de flujo del lado del servidor. Aunque no es un error de protocolo, esto destaca una debilidad de implementación común que puede ser explotada para causar una denegación de servicio (DoS).

Information

Published : 2025-09-02 14:15

Updated : 2026-10-14 17:17


NVD link : CVE-2025-9784

Mitre link : CVE-2025-9784

CVE.ORG link : CVE-2025-9784


JSON object : View

Products Affected

redhat

  • fuse
  • process_automation
  • build_of_apache_camel_for_spring_boot
  • jboss_enterprise_application_platform_expansion_pack
  • undertow
  • enterprise_linux
  • jboss_enterprise_application_platform
  • single_sign-on
CWE
CWE-770

Allocation of Resources Without Limits or Throttling

CWE-404

Improper Resource Shutdown or Release