CVE-2025-9784
published 2025-09-02CVE-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…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
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).
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | undertow | < undertow 2.3.20-1 (forky) | undertow 2.3.20-1 (forky) |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | fuse | — | — |
| redhat | jboss_enterprise_application_platform | — | — |
| redhat | jboss_enterprise_application_platform | — | — |
| redhat | process_automation | — | — |
| redhat | single_sign-on | — | — |
| redhat | undertow | >= 0 < 2.3.20-1 | 2.3.20-1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH