Insufficient UI Warning of Dangerous Operations in Firefox for Android and Mozilla Firefox - CVE-2023-6871

Vulnerability identifier: #VU84573

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-6871

CWE-ID: CWE-357

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to lack of protocol handler warning when navigating to a new protocol handler. A remote attacker can perform spoofing attack.

Firefox for Android
Mozilla Firefox
Gentoo Linux
Ubuntu
openEuler
Fedora
flatpak-sdk
flatpak-runtime
www-client/firefox
firefox (Ubuntu package)
firefox-flatpak
firefox
firefox-debuginfo
firefox-debugsource

Install updates from vendor's website.

Firefox for Android - update to 121.0
Mozilla Firefox - update to 121.0
flatpak-sdk - update to f39-7
flatpak-runtime - update to f39-16
www-client/firefox - update to 104
firefox (Ubuntu package) - addressed in versions 121.0+build1-0ubuntu0.20.04.1, 121.0.1+build1-0ubuntu0.20.04.1
firefox-flatpak - update to 121.0-1
firefox - update to 128.8.0-1
firefox-debuginfo - update to 128.8.0-1
firefox-debugsource - update to 128.8.0-1

• https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/

• Multiple vulnerabilities in Mozilla Firefox
• Fedora 39 Flatpaks update for firefox-flatpak, flatpak-runtime, flatpak-sdk
• Ubuntu update for firefox
• Gentoo update for Mozilla Firefox
• Ubuntu update for firefox
• openEuler 22.03 LTS SP3 update for firefox
• openEuler 22.03 LTS SP4 update for firefox