### [CVE-2019-9513](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9513)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-400%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.

### POC

#### Reference
- https://kb.cert.org/vuls/id/605641/
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/flyniu666/ingress-nginx-0.21-1.19.5
- https://github.com/rmtec/modeswitcher
- https://github.com/vshaliii/DC-4-Vulnhub-Walkthrough