CVEs-PoC/2020/CVE-2020-6799.md

### [CVE-2020-6799](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6799)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2073%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Arbitrary%20code%20execution%20when%20opening%20pdf%20links%20from%20other%20applications%2C%20when%20Firefox%20is%20configured%20as%20default%20pdf%20reader&color=brighgreen)

### Description

Command line arguments could have been injected during Firefox invocation as a shell handler for certain unsupported file types. This required Firefox to be configured as the default handler for a given file type and for a file downloaded to be opened in a third party application that insufficiently sanitized URL data. In that situation, clicking a link in the third party application could have been used to retrieve and execute files whose location was supplied through command line arguments. Note: This issue only affects Windows operating systems and when Firefox is configured as the default handler for non-default filetypes. Other operating systems are unaffected. This vulnerability affects Firefox < 73 and Firefox < ESR68.5.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1606596

#### Github
- https://github.com/ARPSyndicate/cvemon