Vulnerability identifier: #VU27193

Vulnerability risk: Critical

CVSSv3.1: 10 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

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

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing email in the iOS MobileMail. A remote attacker can send a specially crafted email message, trigger an out-of-bounds write and execute arbitrary code on the target system. No user interaction is required to execute arbitrary code.

Note, this vulnerability is being actively exploited in the wild.

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

Vulnerable software versions

Apple iOS: 13.4 17E255 - 13.4.1 17E262, 13.3 17C54 - 13.3.1 17D50, 13.2 17B84 - 13.2.3 17B111, 13.1 17A844 - 13.1.3 17A878, 12.4 16G77 - 12.4.3 16G130, 12.3 16F156 - 12.3.2 16F250, 12.1 16B92 - 12.1.4 16D57, 12.0 16A366 - 12.0.1 16A404, 11.4 - 11.4.1, 11.3 - 11.3.1, 11.1 - 11.1.2, 11.2 - 11.2.6, 11.0.0 - 11.0.3

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External links
http://blog.zecops.com/vulnerabilities/unassisted-ios-attacks-via-mobilemail-maild-in-the-wild/

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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?

Yes. This vulnerability is being exploited in the wild.