Privilege escalation in Apple iOS and iPadOS



Published: 2021-07-26
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-30807
CWE ID CWE-119
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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iPadOS
Operating systems & Components / Operating system

Apple iOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Advisory

This security advisory describes one high risk vulnerability.

1) Buffer overflow

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-30807

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to a boundary within the IOMobileFrameBuffer subsystem. A local application can trigger memory corruption and execute arbitrary code on the target system with kernel privileges.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

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

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

CPE External links

https://support.apple.com/en-us/HT212623

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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