Detections
Analytics
CVE-2025-9784
high
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).
References
https://www.kb.cert.org/vuls/id/767506
https://issues.redhat.com/browse/UNDERTOW-2598
https://github.com/undertow-io/undertow/releases/tag/2.2.38.Final
https://github.com/undertow-io/undertow/pull/1778