CVE-2024-5971: Undertow: response write hangs in case of java 17 tlsv1.3 newsessionticket

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-08 · updated 2026-09-04
Weakness: CWE-674

Description

A vulnerability was found in Undertow, where the chunked response hangs after the body was flushed. The response headers and body were sent but the client would continue waiting as Undertow does not send the expected 0\r\n termination of the chunked response. This results in uncontrolled resource consumption, leaving the server side to a denial of service attack. This happens only with Java 17 TLSv1.3 scenarios.

Affected products

Red Hat build of Apache Camel - HawtIO 4: all versions
Red Hat build of Apache Camel for Spring Boot 3: all versions
Red Hat Fuse 7: all versions
Red Hat Integration Camel K 1: all versions
Red Hat JBoss Enterprise Application Platform: all versions — fixed in 2.2.33.SP1-redhat-00001
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8: all versions — fixed in 0:2.2.33-1.SP1_redhat_00001.1.el8eap
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9: all versions — fixed in 0:2.2.33-1.SP1_redhat_00001.1.el9eap
Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7: all versions — fixed in 0:2.2.33-1.SP1_redhat_00001.1.el7eap

How to fix

Upgrade to a fixed version: Red Hat JBoss Enterprise Application Platform 2.2.33.SP1-redhat-00001; Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 0:2.2.33-1.SP1_redhat_00001.1.el8eap; Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 0:2.2.33-1.SP1_redhat_00001.1.el9eap; Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 0:2.2.33-1.SP1_redhat_00001.1.el7eap. Check the vendor advisory for mitigations.

References

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