Kernel-memory disclosure via out-of-bounds read
Published Sep 8, 2021 · Updated Aug 3, 2024
An out-of-bounds read in the Apple iOS and iPadOS kernel before 14.5 allows local users to read kernel memory via crafted input. Kernel input validation permits an unspecified operation to read beyond a buffer boundary; Apple has not identified the affected kernel interface or input format. Local access with low privileges is required, and the documented consequence is kernel-memory disclosure without reported modification or service interruption.
Summary
What happened
An out-of-bounds read in the Apple iOS and iPadOS kernel before 14.5 allows local users to read kernel memory via crafted input. Kernel input validation permits an unspecified operation to read beyond a buffer boundary; Apple has not identified the affected kernel interface or input format. Local access with low privileges is required, and the documented consequence is kernel-memory disclosure without reported modification or service interruption.
The record
- CVE
- CVE-2021-1877
- Published
- Sep 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=unspecified <14.5
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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