cve/2019/CVE-2019-14657.md

### [CVE-2019-14657](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14657)
![](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

Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.

### POC

#### Reference
- https://sway.office.com/3pCb559LYVuT0eig

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