CVE-2025-9784
Full vulnerability record from the local CVENow database.
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).
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2025-09-02 14:15:36.593000
Last modified
2026-11-04 22:17:40.723000
View original CVE JSON
{
"id": "CVE-2025-9784",
"sourceIdentifier": "[email protected]",
"published": "2025-09-02T14:15:36.593",
"lastModified": "2026-11-04T22:17:40.723",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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)."
},
{
"lang": "es",
"value": "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)."
}
],
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{
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