Buffer overflow in Mozilla Firefox - CVE-2021-38499
Published: October 5, 2021
Vulnerability identifier: #VU57069
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-2021-38499
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
Ubuntu
firefox (Ubuntu package)
Ubuntu
firefox (Ubuntu package)
How to mitigate CVE-2021-38499
Install updates from vendor's website.
Mozilla Firefox - update to 93.0
firefox (Ubuntu package) - addressed in versions 93.0+build1-0ubuntu0.18.04.1, 93.0+build1-0ubuntu0.20.04.1, 93.0+build1-0ubuntu0.21.04.1
firefox (Ubuntu package) - addressed in versions 93.0+build1-0ubuntu0.18.04.1, 93.0+build1-0ubuntu0.20.04.1, 93.0+build1-0ubuntu0.21.04.1