Denial of Service Vulnerability in Undertow Cache of HTTP Headers

CVE-2016-9589 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

Undertow in Red Hat wildfly before version 11.0.0.Beta1 is vulnerable to a resource exhaustion resulting in a denial of service. Undertow keeps a cache of seen HTTP headers in persistent connections. It was found that this cache can easily exploited to fill memory with garbage, up to "max-headers" (default 200) * "max-header-size" (default 1MB) per active TCP connection.

Learn more about our Web Application Penetration Testing UK.