--- id: CVE-2024-1300 title: >- A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support summary: >- A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support. When processing an unknown SNI server name assigned the default certificate instead of a mapped certificate, the SSL c… severity: medium cvss: 5.4 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L' cwe: - CWE-772 vendor: Red Hat product: 'io.vertx:vertx-core' affected: - 'io.vertx:vertx-core >= 4.3.4 <= 4.5.2' - vertx-core - cryostat-tech-preview/cryostat-grafana-dashboard-rhel8 (all versions) - cryostat-tech-preview/cryostat-operator-bundle (all versions) - cryostat-tech-preview/cryostat-reports-rhel8 (all versions) - cryostat-tech-preview/cryostat-rhel8 (all versions) - cryostat-tech-preview/cryostat-rhel8-operator (all versions) - cryostat-tech-preview/jfr-datasource-rhel8 (all versions) - mtr/mtr-operator-bundle (all versions) - mtr/mtr-rhel8-operator (all versions) - mtr/mtr-web-container-rhel8 (all versions) - mtr/mtr-web-executor-container-rhel8 (all versions) - mta/mta-windup-addon-rhel9 (all versions) - vertx-core - vertx-core - io.vertx/vertx-core (all versions) - vertx-core - vertx-core - vertx-core - vertx-core - vertx-core (all versions) - vertx-core (all versions) - vertx-core (all versions) - vertx-core (all versions) - vertx-core (all versions) - vertx-core - vertx-core - vertx-core (all versions) - vertx-core (all versions) - vertx-core (all versions) - vertx-core - vertx-core - vertx-core - vertx-core (all versions) published: '2024-04-02' updated: '2026-09-23' sourceUpdated: '2026-09-23T04:17:41.237' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-1300' references: - url: 'https://access.redhat.com/errata/RHSA-2024:1662' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1706' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1923' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:2088' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:2833' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:3527' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:3989' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:4884' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2024-1300' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2263139' label: secalert@redhat.com - url: 'https://vertx.io/docs/vertx-core/java/#_server_name_indication_sni.' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1662' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1706' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1923' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:2088' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:2833' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:3527' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:3989' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:4884' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/security/cve/CVE-2024-1300' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2263139' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://vertx.io/docs/vertx-core/java/#_server_name_indication_sni.' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1300.json - url: 'https://www.cve.org/CVERecord?id=CVE-2024-1300' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-1300' tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.01064 epssPercentile: 0.63208 ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2024-04-02T15:16:36.592165Z' ingestedAt: '2026-08-05T10:46:47.925Z' patched: - cryostat_2_on_rhel 8 - migration_toolkit_for_runtimes_1_on_rhel 8 - mta_6_2_for_rhel 8 - ceq 3.2 - rhint_service_registry_2_5_11_ga - amq_streams 2.7.0 - build_of_apache_camel_4_4_1_for_spring_boot 3.2 - build_of_quarkus 3.2.11.Final --- ## Overview A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support. When processing an unknown SNI server name assigned the default certificate instead of a mapped certificate, the SSL context is erroneously cached in the server name map, leading to memory exhaustion. This flaw allows attackers to send TLS client hello messages with fake server names, triggering a JVM out-of-memory error. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2024:2088** · Red Hat · fixed in: Cryostat 2 on RHEL 8 · released 2024-04-29 · [advisory](https://access.redhat.com/errata/RHSA-2024:2088) - **RHSA-2024:1923** · Red Hat · fixed in: Migration Toolkit for Runtimes 1 on RHEL 8 · released 2024-04-18 · [advisory](https://access.redhat.com/errata/RHSA-2024:1923) - **RHSA-2024:3989** · Red Hat · fixed in: MTA 6.2 for RHEL 8 · released 2024-06-20 · [advisory](https://access.redhat.com/errata/RHSA-2024:3989) - **RHSA-2024:1706** · Red Hat · fixed in: CEQ 3.2 · released 2024-04-09 · [advisory](https://access.redhat.com/errata/RHSA-2024:1706) - **RHSA-2024:2833** · Red Hat · fixed in: RHINT Service Registry 2.5.11 GA · released 2024-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2024:2833) - **RHSA-2024:3527** · Red Hat · fixed in: Red Hat AMQ Streams 2.7.0 · released 2024-05-30 · [advisory](https://access.redhat.com/errata/RHSA-2024:3527) - **RHSA-2024:4884** · Red Hat · fixed in: Red Hat build of Apache Camel 4.4.1 for Spring Boot 3.2 · released 2024-07-25 · [advisory](https://access.redhat.com/errata/RHSA-2024:4884) - **RHSA-2024:1662** · Red Hat · fixed in: Red Hat build of Quarkus 3.2.11.Final · released 2024-04-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:1662) - **Red Hat VEX** · Moderate · affected: Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 3, Red Hat Build of Keycloak, Red Hat build of OptaPlanner 8, Red Hat build of Quarkus, Red Hat Integration Camel K 1, … · no fix planned: Red Hat build of Apache Camel for Spring Boot 3, Red Hat build of OptaPlanner 8, Red Hat build of Quarkus, Red Hat Integration Camel K 1, … · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1300.json)