cve/2019/CVE-2019-9809.md

### [CVE-2019-9809](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9809)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2066%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Denial%20of%20service%20through%20FTP%20modal%20alert%20error%20messages&color=brighgreen)

### Description

If the source for resources on a page is through an FTP connection, it is possible to trigger a series of modal alert messages for these resources through invalid credentials or locations. These messages cannot be immediately dismissed, allowing for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1282430

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