CVEs-PoC/2021/CVE-2021-25122.md

### [CVE-2021-25122](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25122)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Tomcat&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20Tomcat%2010%3C%2010.0.2%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-200%20Information%20Exposure&color=brighgreen)

### Description

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

### POC

#### Reference
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/DNTYO/F5_Vulnerability
- https://github.com/vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough