{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-1635", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2024-02-19T17:25:58.418Z", "datePublished": "2024-02-19T21:23:14.496Z", "dateUpdated": "2025-06-25T00:32:58.709Z"}, "containers": {"cna": {"title": "Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "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. \r\n\r\nAt 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."}], "affected": [{"versions": [{"status": "affected", "version": "1.31.0"}], "packageName": "undertow", "collectionURL": "https://github.com/undertow-io/undertow", "defaultStatus": "unaffected"}, {"vendor": "Red Hat", "product": "Red Hat build of Apache Camel 4.4.1 for Spring Boot 3.2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:apache_camel_spring_boot:4.4::el6"]}, {"vendor": "Red Hat", "product": "Red Hat Fuse 7.13.0", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:jboss_fuse:7"]}, {"vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform 7", "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html", "defaultStatus": "unaffected", "packageName": "undertow", "cpes": ["cpe:/a:redhat:jboss_enterprise_application_platform:7.4"]}, {"vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "eap7-activemq-artemis", "defaultStatus": "affected", "versions": [{"version": "0:1.5.5.016-1.redhat_00001.1.ep7.el7", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7"]}, {"vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "eap7-artemis-native", "defaultStatus": "affected", "versions": [{"version": "1:1.5.5.016-1.redhat_00001.1.ep7.el7", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7"]}, 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"package": "eap7-jboss-server-migration-0:1.7.2-16.Final_redhat_00017.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7", "release_date": "2025-06-25T00:00:00Z"}, {"advisory": "RHSA-2025:9583", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7", "package": "eap7-netty-0:4.1.63-5.Final_redhat_00003.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7", "release_date": "2025-06-25T00:00:00Z"}, {"advisory": "RHSA-2025:9583", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7", "package": "eap7-undertow-0:2.0.41-4.SP5_redhat_00001.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7", "release_date": "2025-06-25T00:00:00Z"}, {"advisory": "RHSA-2025:9583", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7", "package": "eap7-wildfly-0:7.3.14-3.GA_redhat_00002.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7", "release_date": "2025-06-25T00:00:00Z"}, {"advisory": "RHSA-2025:9583", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7", "package": "eap7-wildfly-elytron-0:1.10.17-1.Final_redhat_00001.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7", "release_date": "2025-06-25T00:00:00Z"}, {"advisory": "RHSA-2024:1675", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7.4::el8", "package": "eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el8eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8", "release_date": "2024-04-04T00:00:00Z"}, {"advisory": "RHSA-2024:1676", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7.4::el9", "package": "eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el9eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9", "release_date": "2024-04-04T00:00:00Z"}, {"advisory": "RHSA-2024:1674", "cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7.4::el7", "package": "eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el7eap", "product_name": "Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7", "release_date": "2024-04-04T00:00:00Z"}, {"advisory": "RHSA-2024:1860", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el7", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el7sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 7", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1861", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el8", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el8sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 8", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1862", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el9", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el9sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 9", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1864", "cpe": "cpe:/a:redhat:rhosemc:1.0::el8", "package": "rh-sso-7/sso76-openshift-rhel8:7.6-46", "product_name": "RHEL-8 based Middleware Containers", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1866", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6", "package": "undertow", "product_name": "RHSSO 7.6.8", "release_date": "2024-04-16T00:00:00Z"}], "bugzilla": {"description": "undertow: Out-of-memory Error after several closed connections with wildfly-http-client protocol", "id": "2264928", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2264928"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["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. \nAt 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.", "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. \nAt 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."], "mitigation": {"lang": "en:us", "value": "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."}, "name": "CVE-2024-1635", "package_state": [{"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Not affected", "package_name": "undertow", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:camel_quarkus:3", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat build of Apache Camel 4 for Quarkus 3"}, {"cpe": "cpe:/a:redhat:camel_spring_boot:3", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat build of Apache Camel for Spring Boot 3"}, {"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Affected", "package_name": "undertow", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:service_registry:2", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat build of Apicurio Registry 2"}, {"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:optaplanner:::el6", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat build of OptaPlanner 8"}, {"cpe": "cpe:/a:redhat:quarkus:3", "fix_state": "Not affected", "package_name": "io.quarkus/quarkus-undertow", "product_name": "Red Hat build of Quarkus"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:integration:1", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat Integration Camel K 1"}, {"cpe": "cpe:/a:redhat:camel_quarkus:2", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat Integration Camel Quarkus 2"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:7", "fix_state": "Out of support scope", "package_name": "undertow", "product_name": "Red Hat JBoss Data Grid 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Not affected", "package_name": "undertow", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jboss_fuse_service_works:6", "fix_state": "Out of support scope", "package_name": "undertow", "product_name": "Red Hat JBoss Fuse Service Works 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7", "fix_state": "Affected", "package_name": "undertow", "product_name": "Red Hat Process Automation 7"}, {"cpe": "cpe:/a:redhat:amq_streams:1", "fix_state": "Not affected", "package_name": "undertow", "product_name": "streams for Apache Kafka"}], "public_date": "2023-10-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-1635\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-1635"], "statement": "This is rated as Important due to the fact that this might be an unauthenticated remote issue exploited by a malicious user, causing a denial of service (DoS) to the affected server.", "threat_severity": "Important"}