### [CVE-2019-17011](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17011)
![](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=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20when%20retrieving%20a%20document%20in%20antitracking&color=brighgreen)

### Description

Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

### POC

#### Reference
- https://www.mozilla.org/security/advisories/mfsa2019-38/
- https://www.mozilla.org/security/advisories/mfsa2019-38/

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