Out-of-bounds write in macOS - CVE-2021-1776
Published: February 2, 2021
Vulnerability identifier: #VU50183
CSH Severity: High
CVSSv4.0: 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/E:U/U:Amber
CVE-ID: CVE-2021-1776
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
macOS
macOS
Software vendor:
Apple Inc.
Apple Inc.
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing fonts within the CoreGraphics component in macOS. A remote attacker can create a specially crafted website or document, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.
Remediation
Install updates from vendor's website.