CVE-2021-29959 Security feature bypass in Firefox
Attackers can bypass camera permission restrictions in Firefox if microphone access is active, allowing unauthorized camera re-enablement without user consent.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-29959?
CVE-2021-29959 is a medium-severity vulnerability in Mozilla Firefox, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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. This vulnerability affects Firefox < 89.
Weakness: CWE-863
Which versions are affected by CVE-2021-29959?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2021-29959?
Upgrade to a fixed version.
Is CVE-2021-29959 being exploited?
There is no known exploitation of CVE-2021-29959 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-h8mp-p8xw-22g5, UBUNTU-CVE-2021-29959.