Use-after-free in Mozilla Firefox - CVE-2020-15675

Vulnerability identifier: #VU46962

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-2020-15675

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing HTML content in WebGL. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mozilla Firefox
Arch Linux
Ubuntu
openEuler
firefox (Alpine package)
firefox
firefox-debuginfo
firefox-debugsource
mozilla-crashreporter-firefox-debuginfo
firefox (Ubuntu package)

Install updates from vendor's website.

Mozilla Firefox - update to 81.0
firefox - update to 79.0-26
firefox-debuginfo - update to 79.0-26
firefox-debugsource - update to 79.0-26
mozilla-crashreporter-firefox-debuginfo - update to 79.0-26
firefox (Ubuntu package) - addressed in versions 81.0+build2-0ubuntu0.16.04.1, 81.0+build2-0ubuntu0.18.04.1, 81.0+build2-0ubuntu0.20.04.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/

• Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
• Use-after-free in firefox (Alpine package)
• Arch Linux update for firefox
• openEuler 20.03 LTS SP4 update for firefox
• Ubuntu update for firefox