CVE-2024-3653

Undertow: learningpushhandler can lead to remote memory dos attacks

publishedCWE-401

A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, leaving the maxAge config in the handler unconfigured. The default is -1, which makes the handler vulnerable. If someone overwrites that config, the server is not subject to the attack. The attacker needs to be able to reach the server with a normal HTTP request.

Technical severity5.3 mediumCVSS 3.1 · CNA: redhat

Published2024-07-08Source updated 2026-11-06

Collected2026-11-062 attributed sources

Fixes and workarounds

Workaround

Setting the maxAge configuration is sufficient to prevent the behavior of this vulnerability being explored.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
`undertow` https://github.com/undertow-io/undertow	≥ 0; ≤ 2.3.14.Final (affected, custom) Other versions: unaffected	CNA: redhat
Red Hat build of Quarkus 3.8.6.redhat Red Hat `io.quarkus.http/quarkus-http-core` https://access.redhat.com/downloads/content/package-browser/	≥ 5.2.4.redhat-00001; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform Red Hat `io.undertow/undertow-core` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	≥ 2.2.33.SP1-redhat-00001; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 Red Hat `eap7-undertow` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.2.33-1.SP1_redhat_00001.1.el8eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 Red Hat `eap7-undertow` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.2.33-1.SP1_redhat_00001.1.el9eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 Red Hat `eap7-undertow` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.2.33-1.SP1_redhat_00001.1.el7eap; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform 8 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
OpenShift Serverless Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Apache Camel 4 for Quarkus 3 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Apache Camel for Spring Boot 4 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Apache Camel - HawtIO 4 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Apicurio Registry 2 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Build of Keycloak Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of OptaPlanner 8 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat build of Quarkus Red Hat `quarkus-undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Data Grid 8 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Fuse 7 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Integration Camel K 1 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Integration Camel Quarkus 2 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat JBoss Data Grid 7 Red Hat `undertow` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: unknown	CNA: redhat
Red Hat JBoss Enterprise Application Platform Expansion Pack Red Hat `undertow` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: unaffected	CNA: redhat
Red Hat JBoss Fuse Service Works 6 Red Hat `undertow` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: unknown	CNA: redhat
Red Hat Process Automation 7 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Single Sign-On 7 Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
streams for Apache Kafka Red Hat `undertow` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.3 medium	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2024:4392CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:5143CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:5144CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:5145CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:5147CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:6437CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2024-3653CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2274437CNA: redhat · issue-tracking, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:4392ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/security/cve/CVE-2024-3653ADP: CVE · vdb-entry, x_refsource_REDHAT, x_transferred
https://bugzilla.redhat.com/show_bug.cgi?id=2274437ADP: CVE · issue-tracking, x_refsource_REDHAT, x_transferred
https://security.netapp.com/advisory/ntap-20240828-0002/ADP: CVE

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