Input validation error in Mozilla Firefox and Firefox ESR - CVE-2022-46874

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation of long filenames during drag and drop actions, which causes filename truncation to a potentially malicious extension. A remote attacker can trick the victim to download a file with a long filename, which can be automatically truncated by the browser into an executable file.

How to mitigate CVE-2022-46874

Sources

• https://www.mozilla.org/en-US/security/advisories/mfsa2022-51/
• https://www.mozilla.org/en-US/security/advisories/mfsa2022-52/