Improper Authorization in Handler for Custom URL Scheme in Mozilla Firefox - CVE-2022-34478
Published: June 29, 2022
Vulnerability identifier: #VU64761
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-34478
CWE-ID: CWE-939
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insecure usage of URI handlers that allow usage of ms-msdt, search, and search-ms protocols. A remote attacker can trick the victim to click on a specially crafted link and execute arbitrary code on the system, if the victim accepts the browser prompt.
The vulnerability affects Firefox on Windows.
How to mitigate CVE-2022-34478
Install updates from vendor's website.