Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol
Summary
| CVE | CVE-2024-1635 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2024-02-19 22:15:48 UTC |
| Updated | 2026-08-04 18:16:40 UTC |
| Description | A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available. At HTTP upgrade to remoting, the WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.045720000 probability, percentile 0.906820000 (date 2026-08-04)
Problem Types: CWE-400 | CWE-400 Uncontrolled Resource Consumption
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Netapp | Active Iq Unified Manager | - | All | All | All |
| Application | Netapp | Active Iq Unified Manager | - | All | All | All |
| Application | Netapp | Active Iq Unified Manager | - | All | All | All |
| Application | Netapp | Oncommand Workflow Automation | - | All | All | All |
| Application | Redhat | Fuse | 1.0 | All | All | All |
| Application | Redhat | Integration Camel For Spring Boot | - | All | All | All |
| Application | Redhat | Jboss Enterprise Application Platform | 7.4 | All | All | All |
| Application | Redhat | Openshift Container Platform | 4.11 | All | All | All |
| Application | Redhat | Openshift Container Platform | 4.12 | All | All | All |
| Application | Redhat | Openshift Container Platform For Linuxone | 4.10 | All | All | All |
| Application | Redhat | Openshift Container Platform For Linuxone | 4.9 | All | All | All |
| Application | Redhat | Openshift Container Platform For Power | 4.10 | All | All | All |
| Application | Redhat | Openshift Container Platform For Power | 4.9 | All | All | All |
| Application | Redhat | Single Sign-on | - | All | All | All |
| Application | Redhat | Single Sign-on | 7.6 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Build Of Apache Camel 4.4.1 For Spring Boot 3.2 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Fuse 7.13.0 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform | unaffected 2.2.30.SP1-redhat-00001 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:1.5.5.016-1.redhat_00001.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 1:1.5.5.016-1.redhat_00001.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:3.5.11-1.Final_redhat_00001.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:1.14.2-1.redhat_00002.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:1.4.18-14.SP13_redhat_00001.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:7.1.10-2.GA_redhat_00002.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:5.0.3-2.redhat_00002.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:2.0.10-2.redhat_00002.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-3.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-3.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-5.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-3.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-5.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.10.4-2.redhat_00006.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:1.7.2-16.Final_redhat_00017.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:4.1.63-5.Final_redhat_00003.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.0.41-4.SP5_redhat_00001.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:7.3.14-3.GA_redhat_00002.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:1.10.17-1.Final_redhat_00001.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 For RHEL 8 | unaffected 0:2.2.30-1.SP1_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 For RHEL 9 | unaffected 0:2.2.30-1.SP1_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 On RHEL 7 | unaffected 0:2.2.30-1.SP1_redhat_00001.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat Single Sign-On 7.6 For RHEL 7 | unaffected 0:18.0.13-1.redhat_00001.1.el7sso * rpm | Not specified |
| CNA | Red Hat | Red Hat Single Sign-On 7.6 For RHEL 8 | unaffected 0:18.0.13-1.redhat_00001.1.el8sso * rpm | Not specified |
| CNA | Red Hat | Red Hat Single Sign-On 7.6 For RHEL 9 | unaffected 0:18.0.13-1.redhat_00001.1.el9sso * rpm | Not specified |
| CNA | Red Hat | RHEL-8 Based Middleware Containers | unaffected 7.6-46 * rpm | Not specified |
| CNA | Red Hat | RHSSO 7.6.8 | Not specified | Not specified |
| CNA | Red Hat | OpenShift Serverless | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Apache Camel 4 For Quarkus 3 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Apache Camel For Spring Boot 3 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Apache Camel For Spring Boot 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Apicurio Registry 2 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of OptaPlanner 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Quarkus | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Quarkus | Not specified | Not specified |
| CNA | Red Hat | Red Hat Data Grid 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Integration Camel K 1 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Integration Camel Quarkus 2 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Data Grid 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Fuse Service Works 6 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Process Automation 7 | Not specified | Not specified |
| CNA | Red Hat | Streams For Apache Kafka | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2024:1674 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1676 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/security/cve/CVE-2024-1635 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2025:9583 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:4226 | [email protected] | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:3354 | [email protected] | access.redhat.com | Third Party Advisory |
| bugzilla.redhat.com/show_bug.cgi | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1864 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1866 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1860 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1862 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| security.netapp.com/advisory/ntap-20240322-0007 | af854a3a-2127-422b-91ae-364da2661108 | security.netapp.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2024:4884 | [email protected] | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1861 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1677 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| access.redhat.com/errata/RHSA-2024:1675 | af854a3a-2127-422b-91ae-364da2661108 | access.redhat.com | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2024-02-19T00:00:00.000Z | Reported to Red Hat. |
| CNA | 2023-10-27T00:00:00.000Z | Made public. |
Workarounds
CNA: No mitigation is currently available for this vulnerability. However, there might be some protections, such as request limits by a load balancer in front of JBoss EAP/Wildfly or even Undertow, that could minimize the impact.