Security features bypass in Mozilla Firefox and Firefox for Android - CVE-2023-23604

Vulnerability identifier: #VU71230

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-23604

CWE-ID: CWE-254

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to the possibility to create a duplicate SystemPrincipal object when parsing a non-system html document via DOMParser::ParseFromSafeString. This could have lead to bypassing web security checks.

Mozilla Firefox
Firefox for Android
Gentoo Linux
Ubuntu
www-client/firefox
firefox (Ubuntu package)

Install updates from vendor's website.

Mozilla Firefox - update to 109.0
Firefox for Android - update to 109.1.1
www-client/firefox - update to 104
firefox (Ubuntu package) - addressed in versions 109.0+build2-0ubuntu0.18.04.1, 109.0+build2-0ubuntu0.20.04.1, 109.0.1+build1-0ubuntu0.18.04.2, 109.0.1+build1-0ubuntu0.20.04.2

• https://www.mozilla.org/en-US/security/advisories/mfsa2023-01/

• Multiple vulnerabilities in Mozilla Firefox
• Ubuntu update for firefox
• Ubuntu update for firefox
• Gentoo update for Mozilla Firefox