#VU72158 Cryptographic issues in Apple iOS and iPadOS - CVE-2021-30997

Vulnerability identifier: #VU72158

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30997

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apple iOS
Operating systems & Components / Operating system
iPadOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to recover encrypted information.

The vulnerability exists due to an error when handling encrypted email within Mail application. A remote attacker can recover plaintext contents of an S/MIME-encrypted emails.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apple iOS: 15.0 19A346 - 15.1.1 19B81

iPadOS: 15.0 19A346 - 15.1 19B75

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External links
https://support.apple.com/en-us/HT212976

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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.