CVE-2021-23973 Information disclosure in Firefox
An attacker can potentially reveal information about cross-origin resources via decoding errors in audio/video contexts, affecting Firefox and Thunderbird users.
- 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-2021-23973?
CVE-2021-23973 is a medium-severity vulnerability in Debian Debian Linux, 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 trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Weakness: CWE-209
Which versions are affected by CVE-2021-23973?
It affects 4 products.
Products include Debian Debian Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2021-23973?
Upgrade to a fixed version.
Is CVE-2021-23973 being exploited?
There is no known exploitation of CVE-2021-23973 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2021-23973, GHSA-jw3c-jgq3-cf92, UBUNTU-CVE-2021-23973.