### [CVE-2018-5178](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5178)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2052.8%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Buffer%20overflow%20during%20UTF-8%20to%20Unicode%20string%20conversion%20through%20legacy%20extension&color=brighgreen)

### Description

A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/alisaesage/Disclosures
- https://github.com/badd1e/Disclosures