#VU60406 Sandbox restrictions bypass in Mozilla Firefox and Firefox ESR - CVE-2022-22759
Published: February 8, 2022
Vulnerability identifier: #VU60406
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-22759
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to the way iframes are handled by the browser. If a document created a sandboxed iframe without allow-scripts,
and subsequently appended an element to the iframe's document that e.g.
had a JavaScript event handler - the event handler would have run
despite the iframe's sandbox.
Remediation
Install updates from vendor's website.