Privilege escalation in Apple iOS and iPadOS



Published: 2021-10-12
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-30883
CWE-ID CWE-190
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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Apple iOS
Operating systems & Components / Operating system

iPadOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Integer overflow

EUVDB-ID: #VU57217

Risk: High

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

CVE-ID: CVE-2021-30883

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: Yes

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 18B111, 14.2.1 18B121, 14.3 18C66, 14.4 18D52, 14.4.1 18D61, 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

iPadOS: 14.0 18A373, 14.0.1 18A393, 14.1 18A8395, 14.2 18B92, 14.2 18B111, 14.3 18C66, 14.4 18D52, 14.4.1 18D61, 14.4.2 18D70, 14.5 18E199, 14.5.1 18E212, 14.6 18F72, 14.7 18G69, 14.7 18G70, 14.7.1 18G82, 14.8 18H17, 15.0 19A346

CPE2.3 External links

http://support.apple.com/en-us/HT212846

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.



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