### [CVE-2018-5091](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5091)
![](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=Version&message=%3C%2052.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2058%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20with%20DTMF%20timers&color=brighgreen)

### Description

A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Firefox < 58.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1423086
- https://bugzilla.mozilla.org/show_bug.cgi?id=1423086

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