### [CVE-2019-20477](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20477)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.

### POC

#### Reference
- https://www.exploit-db.com/download/47655

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/anotherik/Config-Portal
- https://github.com/f0ur0four/Insecure-Deserialization