### [CVE-2017-5447](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5447)
![](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%2045.9%20&color=brighgreen)
![](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=Out-of-bounds%20read%20during%20glyph%20processing&color=brighgreen)

### Description

An out-of-bounds read during the processing of glyph widths during text layout. This results in a potentially exploitable crash and could allow an attacker to read otherwise inaccessible memory. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1343552
- https://www.exploit-db.com/exploits/42071/
- https://www.mozilla.org/security/advisories/mfsa2017-12/

#### Github
- https://github.com/LyleMi/dom-vuln-db
- https://github.com/googleprojectzero/domato
- https://github.com/marckwei/temp
- https://github.com/merlinepedra/DONATO
- https://github.com/merlinepedra25/DONATO