CVE-2021-23963 Security feature bypass in Firefox
Attackers can bypass geolocation permission controls in Firefox by exploiting a state reset flaw during WebRTC sharing.
- 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-2021-23963?
CVE-2021-23963 is a medium-severity vulnerability in Mozilla Firefox, published on 26 Feb 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 sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This vulnerability affects Firefox < 85.
Weakness: CWE-281
Which versions are affected by CVE-2021-23963?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2021-23963?
Upgrade to a fixed version.
Is CVE-2021-23963 being exploited?
There is no known exploitation of CVE-2021-23963 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-398j-x47f-2q99, UBUNTU-CVE-2021-23963.