ghsa-95h4-w6j8-2rp8
Vulnerability from github
Published
2025-09-02 15:31
Modified
2025-09-02 20:54
Severity ?
Summary
Undertow MadeYouReset HTTP/2 DDoS Vulnerability
Details
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": [
{
"package": {
"ecosystem": "Maven",
"name": "io.undertow:undertow-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.3.18.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-9784"
],
"database_specific": {
"cwe_ids": [
"CWE-404"
],
"github_reviewed": true,
"github_reviewed_at": "2025-09-02T20:54:27Z",
"nvd_published_at": "2025-09-02T14:15:36Z",
"severity": "HIGH"
},
"details": "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).",
"id": "GHSA-95h4-w6j8-2rp8",
"modified": "2025-09-02T20:54:27Z",
"published": "2025-09-02T15:31:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9784"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-9784"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2392306"
},
{
"type": "PACKAGE",
"url": "https://github.com/undertow-io/undertow"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Undertow MadeYouReset HTTP/2 DDoS Vulnerability"
}
Loading...
Loading...
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.