CVE-2021-24000 Race condition in Firefox
A race condition in Firefox allowed attackers to confuse tab origins, potentially leading to unintended information disclosure via file inputs.
- 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-2021-24000?
CVE-2021-24000 is a low-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
A race condition with requestPointerLock() and setTimeout() could have resulted in a user interacting with one tab when they believed they were on a separate tab. In conjunction with certain elements (such as <input type="file">) this could have led to an attack where a user was confused about the origin of the webpage and potentially disclosed information they did not intend to. This vulnerability affects Firefox < 88.
Weakness: CWE-362
Which versions are affected by CVE-2021-24000?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2021-24000?
Upgrade to a fixed version.
Is CVE-2021-24000 being exploited?
There is no known exploitation of CVE-2021-24000 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-5fpx-ww3h-p9hw, UBUNTU-CVE-2021-24000.