Vulnerability identifier: #VU56067

Vulnerability risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-30860

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: Yes

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 target system.

The vulnerability exists due to integer overflow when processing PDF files within the CoreGraphics component. A remote attacker can trick the victim to open a specially crafted PDF file, trigger integer overflow and execute arbitrary code on the target system.

Note, the vulnerability is being active exploited in-the-wild via the FORCEDENTRY tool against Bahraini activists.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Apple iOS: 14.7 18G69 - 14.7.1 18G82, 14.6 18F72, 14.5 18E199 - 14.5.1 18E212, 14.2 18B92 - 14.2.1 18B121, 14.1 18A8395, 14.0 18A373 - 14.0.1 18A393, 14.4 18D52 - 14.4.2 18D70, 14.3 18C66

iPadOS: 14.0 18A373 - 14.7.1 18G82

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External links
http://citizenlab.ca/2021/08/bahrain-hacks-activists-with-nso-group-zero-click-iphone-exploits/
http://support.apple.com/en-us/HT212807

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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.