Improper Authorization in Handler for Custom URL Scheme in macOS - #VU56813
Published: September 22, 2021
Vulnerability identifier: #VU56813
CSH Severity: Critical
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: N/A
CWE-ID: CWE-939
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to improper input validation in in macOS Finder when processing custom URI schemes, such as File:// or fIle://. A remote attacker can create a specially crafted file with inetloc extension, send it as an email attachment, trick the victim to open the email and execute arbitrary OS commands on the system.
Affected software
macOS
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.