FKIE_CVE-2025-9784

Vulnerability from fkie_nvd - Published: 2025-09-02 14:15 - Updated: 2026-03-18 16:16
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2025:23143
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:0383
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:0384
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:0386
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:3889
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:3891
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:3892
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:4915
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:4916
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:4917
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:4924
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2025-9784Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2392306Issue Tracking
secalert@redhat.comhttps://github.com/undertow-io/undertow/pull/1778
secalert@redhat.comhttps://github.com/undertow-io/undertow/releases/tag/2.2.38.Final
secalert@redhat.comhttps://issues.redhat.com/browse/UNDERTOW-2598
secalert@redhat.comhttps://kb.cert.org/vuls/id/767506
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/767506
Impacted products
Vendor Product Version
redhat build_of_apache_camel_for_spring_boot -
redhat fuse 7.0.0
redhat jboss_enterprise_application_platform 7.0.0
redhat jboss_enterprise_application_platform 8.0.0
redhat jboss_enterprise_application_platform_expansion_pack -
redhat process_automation 7.0
redhat single_sign-on 7.0
redhat undertow -
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
To clipboard 

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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.