cve/2019/CVE-2019-9511.md

### [CVE-2019-9511](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9511)
![](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 window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

### POC

#### Reference
- https://kb.cert.org/vuls/id/605641/
- https://usn.ubuntu.com/4099-1/
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Eldor240/files
- https://github.com/developer3000S/PoC-in-GitHub
- https://github.com/flyniu666/ingress-nginx-0.21-1.19.5
- https://github.com/hectorgie/PoC-in-GitHub
- https://github.com/rmtec/modeswitcher
- https://github.com/vshaliii/DC-4-Vulnhub-Walkthrough