Buffer overflow in Firefox for Android and Mozilla Firefox - CVE-2023-6873

Vulnerability identifier: #VU84575

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-6873

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Firefox for Android
Mozilla Firefox
Debian Linux
Gentoo Linux
Ubuntu
openEuler
Fedora
flatpak-sdk
flatpak-runtime
www-client/firefox
thunderbird (Debian package)
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
thunderbird (Debian package) - addressed in versions 1:115.6.0-1~deb11u1, 1:115.6.0-1~deb12u1
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
• Debian update for thunderbird
• 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