Apache Tomcat HTTP/2 Denial of Service Vulnerability

CVE-2017-5650 · MEDIUM Severity

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

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

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