2021-30795 | Apple iOS/iPadOS WebKit use after free (HT212601)
|CVSS Meta Temp Score
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|CTI Interest Score
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A vulnerability was found in Apple iOS and iPadOS up to 14.6 (Smartphone Operating System). It has been classified as critical. This affects an unknown part of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-416. This is going to have an impact on confidentiality, integrity, and availability.
The weakness was released 07/19/2021 by Sergei Glazunov as HT212601 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2021-30795 since 04/13/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $25k-$100k 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. The advisory points out:
Processing maliciously crafted web content may lead to arbitrary code execution
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 use after free issue was addressed with improved memory management.
VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0
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: Sergei Glazunov
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