CVEs-PoC/2017/CVE-2017-7521.md

### [CVE-2017-7521](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7521)
![](https://img.shields.io/static/v1?label=Product&message=OpenVPN&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=before%202.3.17%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=before%202.4.3%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-400&color=brightgreen)

### Description

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().

### POC

#### Reference
- https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243

#### Github
No PoCs found on GitHub currently.