CVE-2024-1300: Io.vertx:vertx-core: memory leak when a tcp server is configured with tls and sni support

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-02 · updated 2026-09-23
Weakness: CWE-772

Description

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.

Affected products

Red Hat build of Keycloak 26.4: all versions
Red Hat build of Quarkus: all versions
Red Hat Cryostat 2 on RHEL 8: all versions — fixed in 2.4.0-4, 2.4.0-7, 2.4.0-9
Red Hat Migration Toolkit for Runtimes 1 on RHEL 8: all versions — fixed in 1.2-10, 1.2-11, 1.2-12, 1.2-18
Red Hat MTA-6.2-RHEL-9: all versions — fixed in 6.2.3-2
Red Hat build of Apache Camel 4 for Quarkus 3: all versions
Red Hat build of Apache Camel for Spring Boot 3: all versions
Red Hat build of OptaPlanner 8: all versions
Red Hat build of Quarkus 3.2.11.Final: all versions — fixed in 4.4.8.redhat-00001
Red Hat Integration Camel K 1: all versions
Red Hat Integration Camel Quarkus 2: all versions
Red Hat JBoss Data Grid 7: all versions
Red Hat Process Automation 7: all versions

How to fix

Upgrade to a fixed version: Red Hat Cryostat 2 on RHEL 8 2.4.0-4, 2.4.0-7, 2.4.0-9; Red Hat Migration Toolkit for Runtimes 1 on RHEL 8 1.2-10, 1.2-11, 1.2-12, 1.2-18; Red Hat MTA-6.2-RHEL-9 6.2.3-2; Red Hat build of Quarkus 3.2.11.Final 4.4.8.redhat-00001. Check the vendor advisory for mitigations.

References

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