Input validation error in macOS - CVE-2021-1740

Vulnerability identifier: #VU52627

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-1740

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of directory paths. A local user can modify protected parts of the filesystem.

macOS
watchOS
iPadOS
tvOS
Apple iOS

Install updates from vendor's website.

macOS - addressed in versions 10.15.7 19H1030, 11.3 20E232
watchOS - update to 7.4 18T195
iPadOS - update to 14.5 18E199
tvOS - update to 14.5 18L204
Apple iOS - update to 14.5 18E199

• https://support.apple.com/en-us/HT212326
• https://support.apple.com/en-us/HT212325

• Multiple vulnerabilities in macOS
• Multiple vulnerabilities in Apple iOS and iPadOS
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS