CVEs-PoC/2020/CVE-2020-11996.md

### [CVE-2020-11996](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11996)
![](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

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html

#### Github
- https://github.com/0xT11/CVE-POC
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Dzmitry-Basiachenka/dist-foreign-aliakh
- https://github.com/developer3000S/PoC-in-GitHub
- https://github.com/hectorgie/PoC-in-GitHub
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/rusakovichma/tomcat-embed-core-9.0.31-CVE-2020-11996
- https://github.com/soosmile/POC
- https://github.com/vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough