#VU13172 Man-in-the-middle attack in macOS - CVE-2018-4221

Vulnerability identifier: #VU13172

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-4221

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to conduct man-in-the-middle attack on the target system.

The vulnerability exists due to a flaw in the Security component in the handling of S-MIME client certificates. A remote attacker can conduct man-in-the-middle attack, intercept of the communication channel between the affected app and track the target user.

Mitigation
Update to version 10.13.4.

Vulnerable software versions

macOS: 10.13.4 17E199

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External links
https://support.apple.com/en-us/HT208849

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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.