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.
https://bugzilla.redhat.com/show_bug.cgi?id=2274437
https://access.redhat.com/security/cve/CVE-2024-3653
https://access.redhat.com/errata/RHSA-2024:6437
https://access.redhat.com/errata/RHSA-2024:5147
https://access.redhat.com/errata/RHSA-2024:5145
https://access.redhat.com/errata/RHSA-2024:5144