### [CVE-2017-5396](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5396)
![](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%2045.7%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2051%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20with%20Media%20Decoder&color=brighgreen)

### Description

A use-after-free vulnerability in the Media Decoder when working with media files when some events are fired after the media elements are freed from memory. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

### POC

#### Reference
- https://www.mozilla.org/security/advisories/mfsa2017-03/

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