2021-30770 | Apple iOS/iPadOS Kernel access control (HT212601)
|CVSS Meta Temp Score
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|CTI Interest Score
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A vulnerability classified as critical was found in Apple iOS and iPadOS up to 14.6 (Smartphone Operating System). Affected by this vulnerability is an unknown part of the component Kernel. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was disclosed 07/19/2021 by Linus Henze as HT212601 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is known as CVE-2021-30770 since 04/13/2021. The exploitation appears to be difficult. The attack needs to be done within the local network. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/27/2021). It is expected to see the exploit prices for this product increasing in the near future.MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:
An attacker that has already achieved kernel code execution may be able to bypass kernel memory mitigations
Upgrading to version 14.7 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:
A logic issue was addressed with improved validation.
VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.8
Status: Not defined
Upgrade: iOS/iPadOS 14.7
04/13/2021 CVE assigned
07/19/2021 +97 days Advisory disclosed
07/19/2021 +0 days Countermeasure disclosed
07/23/2021 +4 days VulDB entry created
07/27/2021 +4 days VulDB last updateVendor: https://www.apple.com/
Researcher: Linus Henze
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