### [CVE-2017-5455](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5455)
![](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%2052.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2053%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Sandbox%20escape%20through%20internal%20feed%20reader%20APIs&color=brighgreen)

### Description

The internal feed reader APIs that crossed the sandbox barrier allowed for a sandbox escape and escalation of privilege if combined with another vulnerability that resulted in remote code execution inside the sandboxed process. This vulnerability affects Firefox ESR < 52.1 and Firefox < 53.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1341191
- https://www.mozilla.org/security/advisories/mfsa2017-12/

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