### [CVE-2017-5650](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5650)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Tomcat&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Denial%20of%20Service&color=brighgreen)

### Description

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.

### POC

#### Reference
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html

#### Github
- https://github.com/ilmari666/cybsec