### [CVE-2019-9811](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9811)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060.8%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2068%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Sandbox%20escape%20via%20installation%20of%20malicious%20language%20pack&color=brighgreen)

### Description

As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1563327

#### Github
- https://github.com/MyKings/security-study-tutorial