Buffer overflow in macOS - CVE-2021-1818
Published: February 2, 2021
Vulnerability identifier: #VU50204
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-2021-1818
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 image files within the ImageIO component in macOS. A remote attacker can create a specially crafted document, 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
macOS
iPadOS
Apple iOS
iPadOS
Apple iOS
How to mitigate CVE-2021-1818
Install updates from vendor's website.
macOS - addressed in versions 10.15.7 19H512, 11.2 20D64
iPadOS - update to 14.4 18D52
Apple iOS - update to 14.4 18D52
iPadOS - update to 14.4 18D52
Apple iOS - update to 14.4 18D52