Undertow Vulnerability: Enabling Learning-Push Handler Can Prevent Attacks

CVE-2024-3653

5.3MEDIUM

Key Information

Vendor: Red Hat
Status: Red Hat Jboss Enterprise Application Platform 7.1.0; Red Hat Jboss Enterprise Application Platform 7.4 For Rhel 8; Red Hat Jboss Enterprise Application Platform 7.4 For Rhel 9; Red Hat Jboss Enterprise Application Platform 7.4 On Rhel 7
Vendor: CVE Published:; 8 July 2024

Summary

A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, leaving the maxAge config in the handler unconfigured. The default is -1, which makes the handler vulnerable. If someone overwrites that config, the server is not subject to the attack. The attacker needs to be able to reach the server with a normal HTTP request.