#VU72157 Information disclosure in Apple iOS and iPadOS - CVE-2021-30998

Vulnerability identifier: #VU72157

Vulnerability risk: Low

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

CVE-ID: CVE-2021-30998

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Mail application when sending an S/MIME encrypted email using a certificate with more than one email address. A remote attacker can gain obtain user's email address.

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.