Remote code execution in Apple macOS



Published: 2021-09-22
Risk Critical
Patch available NO
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-939
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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macOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Improper Authorization in Handler for Custom URL Scheme

EUVDB-ID: #VU56813

Risk: Critical

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-939 - Improper Authorization in Handler for Custom URL Scheme

Exploit availability: Yes

Description

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.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

macOS: 10.14 18A391, 10.14.1 18B75, 10.14.1 18B2107, 10.14.1 18B3094, 10.14.2 18C54, 10.14.3 18D42, 10.14.3 18D43, 10.14.3 18D109, 10.14.4 18E226, 10.14.4 18E227, 10.14.5 18F132, 10.14.6 18G84, 10.14.6 18G87, 10.14.6 18G95, 10.14.6 18G103, 10.14.6 18G1012, 10.14.6 18G2022, 10.14.6 18G3020, 10.14.6 18G4032, 10.14.6 18G5033, 10.14.6 18G6020, 10.14.6 18G6032, 10.14.6 18G6042, 10.14.6 18G7016, 10.14.6 18G8012, 10.14.6 18G8022, 10.14.6 18G9028, 10.14.6 18G9216, 10.14.6 18G9323, 10.15 19A583, 10.15 19A602, 10.15 19A603, 10.15.1 19B88, 10.15.2 19C57, 10.15.3 19D76, 10.15.4 19E266, 10.15.4 19E287, 10.15.5 19F96, 10.15.5 19F101, 10.15.6 19G73, 10.15.6 19G2021, 10.15.7 19H2, 10.15.7 19H4, 10.15.7 19H15, 10.15.7 19H114, 10.15.7 19H512, 10.15.7 19H524, 10.15.7 19H1030, 10.15.7 19H1217, 10.15.7 19H1323, 10.15.7 19H1417, 11.0 20A2411, 11.0.1 20B29, 11.0.1 20B50, 11.1 20C69, 11.2 20D64, 11.2.1 20D74, 11.2.1 20D75, 11.2.2 20D80, 11.2.3 20D91, 11.3 20E232, 11.3.1 20E241, 11.4 20F71, 11.5 20G71, 11.5.1 20G80, 11.5.2 20G95, 11.6 20G165

CPE2.3 External links

http://ssd-disclosure.com/ssd-advisory-macos-finder-rce/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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