Prototype pollution in Mozilla Firefox - CVE-2023-25731

Vulnerability identifier: #VU72259

CSH Severity: Low

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

CVE-ID: CVE-2023-25731

CWE-ID: CWE-94

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to URL previews in the network panel of developer tools improperly store URLs. A remote attacker can use query parameters to overwrite global objects in privileged code when rendering URLPreview and perform prototype pollution.

Mozilla Firefox
Gentoo Linux
Ubuntu
openEuler
Firefox for Android
Firefox Focus for Android
www-client/firefox
firefox (Ubuntu package)
firefox
firefox-debuginfo
firefox-debugsource

Install updates from vendor's website.

Mozilla Firefox - update to 110.0
Firefox for Android - update to 110.0
Firefox Focus for Android - update to 110.0.1
www-client/firefox - update to 104
firefox (Ubuntu package) - addressed in versions 110.0+build3-0ubuntu0.18.04.1, 110.0+build3-0ubuntu0.20.04.1, 110.0.1+build2-0ubuntu0.18.04.1, 110.0.1+build2-0ubuntu0.20.04.1
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/mfsa2023-05/

• Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
• Multiple vulnerabilities in Firefox for Android
• Multiple vulnerabilities in Firefox Focus for Android
• Ubuntu update for firefox
• Ubuntu update for firefox
• Gentoo update for Mozilla Firefox
• openEuler 22.03 LTS SP4 update for firefox
• openEuler 22.03 LTS SP3 update for firefox