CVE-2019-0199: Uncontrolled Resource Consumption

April 10, 2019 (updated May 28, 2019)

The HTTP/2 implementation in Apache Tomcat accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API’s blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

References

nvd.nist.gov/vuln/detail/CVE-2019-0199

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