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).

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Redhat
  • Apache Camel Hawtio
  • Build Of Apache Camel For Spring Boot
  • Camel Spring Boot
  • Enterprise Linux
  • Fuse
  • Jboss Data Grid
  • Jboss Enterprise Application Platform
  • Jboss Enterprise Application Platform Expansion Pack
  • Jboss Enterprise Bpms Platform
  • Jboss Fuse
  • Jbosseapxp
  • Process Automation
  • Red Hat Single Sign On
  • Single Sign-on
  • Undertow

Configuration 1 [-]

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:*:*:*:*:*:*:*

No data.

References
Link Providers
https://access.redhat.com/security/cve/CVE-2025-9784 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2392306 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-9784 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-9784 cve-icon
History

Wed, 10 Sep 2025 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Apache Camel For Spring Boot
Redhat fuse
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat process Automation
Redhat single Sign-on
Redhat undertow
CPEs 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:*:*:*:*:*:*:*
Vendors & Products Redhat build Of Apache Camel For Spring Boot
Redhat fuse
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat process Automation
Redhat single Sign-on
Redhat undertow

Tue, 02 Sep 2025 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Tue, 02 Sep 2025 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-404

Tue, 02 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 02 Sep 2025 13:45:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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).
Title undertow: Undertow MadeYouReset HTTP/2 DDoS Vulnerability Undertow: undertow madeyoureset http/2 ddos vulnerability
First Time appeared Redhat
Redhat apache Camel Hawtio
Redhat camel Spring Boot
Redhat enterprise Linux
Redhat jboss Data Grid
Redhat jboss Enterprise Application Platform
Redhat jboss Enterprise Bpms Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat red Hat Single Sign On
CPEs cpe:/a:redhat:apache_camel_hawtio:4
cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:jboss_data_grid:8
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jboss_enterprise_bpms_platform:7
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:red_hat_single_sign_on:7
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat apache Camel Hawtio
Redhat camel Spring Boot
Redhat enterprise Linux
Redhat jboss Data Grid
Redhat jboss Enterprise Application Platform
Redhat jboss Enterprise Bpms Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat red Hat Single Sign On
References

Mon, 01 Sep 2025 12:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title undertow: Undertow MadeYouReset HTTP/2 DDoS Vulnerability
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-09-09T09:20:10.717Z

Reserved: 2025-09-01T06:33:05.239Z

Link: CVE-2025-9784

cve-icon Vulnrichment

Updated: 2025-09-02T13:59:07.537Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-02T14:15:36.593

Modified: 2025-09-10T18:59:43.100

Link: CVE-2025-9784

cve-icon Redhat

Severity : Important

Publid Date: 2025-09-01T06:21:54Z

Links: CVE-2025-9784 - Bugzilla