#VU50044 Business Logic Errors in Apple iOS and iPadOS - CVE-2021-1871

Vulnerability identifier: #VU50044

Vulnerability risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2021-1871

CWE-ID: CWE-840

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 execute arbitrary code on the system.

The vulnerability exists due to a logic issue in the WebKit component. A remote attacker can trick a victim to visit a malicious website and execute arbitrary code on the system.

Note: The vulnerability is being actively exploited in the wild.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apple iOS: 14.0 18A373, 14.1 18A8395, 14.2 18B92, 14.3 18C66

iPadOS: 14.0 18A373 - 14.3 18C66

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External links
https://support.apple.com/en-us/HT212146

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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.