#VU57217 Integer overflow in Apple iOS and iPadOS - CVE-2021-30883

Vulnerability identifier: #VU57217

Vulnerability risk: High

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2021-30883

CWE-ID: CWE-190

Exploitation vector: Local

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 malicious application to escalate privileges on the system.

The vulnerability exists due to a boundary error within the IOMobileFrameBuffer subsystem. A malicious application can trigger integer overflow and execute arbitrary code on with kernel privileges.

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 - 14.0.1 18A393, 14.1 18A8395, 14.2 18B92 - 14.2.1 18B121, 14.3 18C66, 14.4 18D52 - 14.4.2 18D70, 14.5 18E199 - 14.5.1 18E212, 14.6 18F72, 14.7 18G69 - 14.7.1 18G82, 14.8 18H17, 15.0 19A346 - 15.0.1 19A348

iPadOS: 14.0 18A373 - 14.8 18H17, 15.0 19A346 - 15.0.1 19A348

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External links
https://support.apple.com/en-us/HT212846

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.