CVE-2023-6206 Security feature bypass in Firefox
Attackers can bypass clickjacking protections by exploiting fullscreen animation timing to trick users into granting permissions.
- 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-2023-6206?
CVE-2023-6206 is a medium-severity vulnerability in Debian Debian Linux, published on 21 Nov 2023. 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
The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Weakness: CWE-1021
Which versions are affected by CVE-2023-6206?
It affects 4 products.
Products include Debian Debian Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2023-6206?
Upgrade to a fixed version.
Is CVE-2023-6206 being exploited?
There is no known exploitation of CVE-2023-6206 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2023-6206, GHSA-68m9-mw54-x3jx, UBUNTU-CVE-2023-6206.