Buffer overflow in Mozilla Firefox - CVE-2021-23988
Published: March 23, 2021
Vulnerability identifier: #VU51668
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-2021-23988
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 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.
Affected software
Mozilla Firefox
Gentoo Linux
Ubuntu
firefox (Ubuntu package)
Gentoo Linux
Ubuntu
firefox (Ubuntu package)
How to mitigate CVE-2021-23988
Install updates from vendor's website.
Mozilla Firefox - update to 87.0
firefox (Ubuntu package) - addressed in versions 87.0+build3-0ubuntu0.16.04.2, 87.0+build3-0ubuntu0.18.04.2, 87.0+build3-0ubuntu0.20.04.2, 87.0+build3-0ubuntu0.20.10.1
firefox (Ubuntu package) - addressed in versions 87.0+build3-0ubuntu0.16.04.2, 87.0+build3-0ubuntu0.18.04.2, 87.0+build3-0ubuntu0.20.04.2, 87.0+build3-0ubuntu0.20.10.1