Main Vulnerability Database Vulnerabilities #VU53486

UNIX Hard Link in macOS - CVE-2021-30738

Published: May 24, 2021

Vulnerability identifier: #VU53486

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-30738

CWE-ID: CWE-62

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Apple Inc.

Affected software:
macOS

Detailed vulnerability description

The vulnerability allows a local application to overwrite arbitrary files.

The vulnerability exists due to path validation logic for hardlinks in PackageKit. A local application can overwrite arbitrary files on the system.

Install updates from vendor's website.