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).
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
undertow
Default version status: unaffected
0 to < 2.2.38.Finalaffected
Red Hat Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8
Default version status: unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7
Default version status: affected
0:1.4.18-21.SP19_redhat_00001.1.ep7.el7 to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7
Default version status: affected
0:2.0.41-8.SP9_redhat_00001.1.el7eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4.24
Default version status: affected
2.2.39.Final-redhat-00001 to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
Default version status: affected
0:2.2.39-1.Final_redhat_00001.1.el7eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
Default version status: affected
0:7.4.24-4.GA_redhat_00002.1.el7eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8
Default version status: affected
0:2.2.39-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8
Default version status: affected
0:7.4.24-4.GA_redhat_00002.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9
Default version status: affected
0:2.2.39-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9
Default version status: affected
0:7.4.24-4.GA_redhat_00002.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0
Default version status: unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:1.83.0-1.redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:33.0.0-2.jre_redhat_00003.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:4.0.6-1.redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:1.0.0-3.redhat_00009.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:2.0.2-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8
Default version status: affected
0:2.3.23-1.SP3_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:1.83.0-1.redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:33.0.0-2.jre_redhat_00003.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:4.0.6-1.redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:1.0.0-3.redhat_00009.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:2.0.2-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9
Default version status: affected
0:2.3.23-1.SP3_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1.3
Default version status: affected
2.3.20.SP4-redhat-00001 to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:4.0.10-1.redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:1.82.0-1.redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:801.3.0-1.GA_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:1.0.1-3.redhat_00003.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:6.6.36-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:4.0.2-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:2.5.0-1.redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:2.3.20-2.SP4_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:8.1.3-4.GA_redhat_00006.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:5.0.12-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:2.6.6-1.Final_redhat_00001.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
Default version status: affected
0:8.1.1-4.GA_redhat_00007.1.el8eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:4.0.10-1.redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:1.82.0-1.redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:801.3.0-1.GA_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:1.0.1-3.redhat_00003.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:6.6.36-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:4.0.2-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:2.5.0-1.redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:2.3.20-2.SP4_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:8.1.3-4.GA_redhat_00006.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:5.0.12-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:2.6.6-1.Final_redhat_00001.1.el9eap to < *unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
Default version status: affected
0:8.1.1-4.GA_redhat_00007.1.el9eap to < *unaffected
Red Hat Red Hat Single Sign-On 7.6.13
Default version status: unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Default version status: affected
0:18.0.20-1.redhat_00001.1.el7sso to < *unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Default version status: affected
0:18.0.20-1.redhat_00001.1.el8sso to < *unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Default version status: affected
0:18.0.20-1.redhat_00001.1.el9sso to < *unaffected
Red Hat RHEL-8 based Middleware Containers
Default version status: affected
7.6-85 to < *unaffected
Red Hat Red Hat build of Apache Camel - HawtIO 4
Default version status: unaffected
Red Hat Red Hat Data Grid 8
Default version status: affected
Red Hat Red Hat Enterprise Linux 10
Default version status: unaffected
Red Hat Red Hat Enterprise Linux 8
Default version status: unaffected
Red Hat Red Hat Enterprise Linux 8
Default version status: unaffected
Red Hat Red Hat Enterprise Linux 9
Default version status: unaffected
Red Hat Red Hat Fuse 7
Default version status: affected
Red Hat Red Hat JBoss Enterprise Application Platform 7
Default version status: affected
Red Hat Red Hat JBoss Enterprise Application Platform 8
Default version status: unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8
Default version status: unaffected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
Default version status: affected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
Default version status: unaffected
Red Hat Red Hat Process Automation 7
Default version status: affected
References
- https://access.redhat.com/errata/RHSA-2025:23143 ↗
- https://access.redhat.com/errata/RHSA-2026:0383 ↗
- https://access.redhat.com/errata/RHSA-2026:0384 ↗
- https://access.redhat.com/errata/RHSA-2026:0386 ↗
- https://access.redhat.com/errata/RHSA-2026:33371 ↗
- https://access.redhat.com/errata/RHSA-2026:33372 ↗
- https://access.redhat.com/errata/RHSA-2026:3889 ↗
- https://access.redhat.com/errata/RHSA-2026:3891 ↗
- https://access.redhat.com/errata/RHSA-2026:3892 ↗
- https://access.redhat.com/errata/RHSA-2026:4915 ↗
- https://access.redhat.com/errata/RHSA-2026:4916 ↗
- https://access.redhat.com/errata/RHSA-2026:4917 ↗
- https://access.redhat.com/errata/RHSA-2026:4924 ↗
- https://access.redhat.com/errata/RHSA-2026:76128 ↗
- https://access.redhat.com/errata/RHSA-2026:76129 ↗
- https://access.redhat.com/errata/RHSA-2026:76130 ↗
- https://access.redhat.com/errata/RHSA-2026:76132 ↗
- https://access.redhat.com/errata/RHSA-2026:76134 ↗
- https://access.redhat.com/security/cve/CVE-2025-9784 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2392306 ↗
- https://github.com/undertow-io/undertow/pull/1778 ↗
- https://github.com/undertow-io/undertow/releases/tag/2.2.38.Final ↗
- https://issues.redhat.com/browse/UNDERTOW-2598 ↗
- https://kb.cert.org/vuls/id/767506 ↗
- https://www.kb.cert.org/vuls/id/767506 ↗