cve/2018/CVE-2018-5142.md

### [CVE-2018-5142](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5142)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2059%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Media%20Capture%20and%20Streams%20API%20permissions%20display%20incorrect%20origin%20with%20data%3A%20and%20blob%3A%20URLs&color=brighgreen)

### Description

If Media Capture and Streams API permission is requested from documents with "data:" or "blob:" URLs, the permission notifications do not properly display the originating domain. The notification states "Unknown protocol" as the requestee, leading to user confusion about which site is asking for this permission. This vulnerability affects Firefox < 59.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366357
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366357

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