#VU53713 Security restrictions bypass


Published: 2021-06-01

Vulnerability identifier: #VU53713

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-29959

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to the way user is prompted to access microphone and camera by the website. When a user has already allowed a website to access microphone and camera, disabling camera sharing would not fully prevent the website from re-enabling it without an additional prompt. This was only possible if the website kept recording with the microphone until re-enabling the camera.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 80.0 - 88.0.1


CPE

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-23/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability