#VU53474 Man-in-the-Middle (MitM) attack in macOS - CVE-2021-30696

Vulnerability identifier: #VU53474

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30696

CWE-ID: CWE-300

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to perform MitM attack.

the vulnerability exists die to a logic issue in the Mail component. A remote attacker on the local network can perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

macOS: 11.0 20A2411 - 11.3.1 20E241

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External links
https://support.apple.com/en-us/HT212529

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.