Out-of-bounds write in Mozilla Firefox and Firefox ESR - CVE-2022-28281

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when handling an unexpected number of WebAuthN Extensions in a Register command to the parent process. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

How to mitigate CVE-2022-28281

Sources

• https://www.mozilla.org/en-US/security/advisories/mfsa2022-13/
• https://www.mozilla.org/en-US/security/advisories/mfsa2022-14/