Buffer overflow in Mozilla Firefox - CVE-2020-26969
Published: November 17, 2020
Vulnerability identifier: #VU48473
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-2020-26969
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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 web page, 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.
Affected software
Mozilla Firefox
Arch Linux
Ubuntu
firefox (Alpine package)
firefox (Ubuntu package)
Firefox for Android
Arch Linux
Ubuntu
firefox (Alpine package)
firefox (Ubuntu package)
Firefox for Android
How to mitigate CVE-2020-26969
Install updates from vendor's website.
Mozilla Firefox - update to 83.0
Firefox for Android - update to 83.0.0
firefox (Ubuntu package) - addressed in versions 83.0+build2-0ubuntu0.16.04.3, 83.0+build2-0ubuntu0.18.04.2, 83.0+build2-0ubuntu0.20.04.1, 83.0+build2-0ubuntu0.20.10.1
Firefox for Android - update to 83.0.0
firefox (Ubuntu package) - addressed in versions 83.0+build2-0ubuntu0.16.04.3, 83.0+build2-0ubuntu0.18.04.2, 83.0+build2-0ubuntu0.20.04.1, 83.0+build2-0ubuntu0.20.10.1