GHSA-ch7q-gpff-h9hp Undertow Missing Release of Memory after Effective Lifetime vulnerability

• Maven io.undertow:undertow-core: >= 2.3.0.Alpha1, < 2.3.15.Final → fixed in 2.3.15.Final • Maven io.undertow:undertow-core: < 2.2.34.Final → fixed in 2.2.34.Final

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.