Information disclosure via ImageIO out-of-bounds read
Published Sep 8, 2021 · Updated Aug 3, 2024
An out-of-bounds read in Apple ImageIO before iOS and iPadOS 14.6 and macOS Big Sur 11.4 allows attackers to disclose user information. ImageIO fails to enforce buffer bounds while decoding attacker-controlled image data, causing it to read beyond the intended buffer; Apple has not disclosed a narrower function or image format. Exploitation requires a crafted image to be processed and user interaction, and the documented consequence is limited to disclosure rather than modification or interruption.
Summary
What happened
An out-of-bounds read in Apple ImageIO before iOS and iPadOS 14.6 and macOS Big Sur 11.4 allows attackers to disclose user information. ImageIO fails to enforce buffer bounds while decoding attacker-controlled image data, causing it to read beyond the intended buffer; Apple has not disclosed a narrower function or image format. Exploitation requires a crafted image to be processed and user interaction, and the documented consequence is limited to disclosure rather than modification or interruption.
The record
- CVE
- CVE-2021-30687
- Published
- Sep 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <14.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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.
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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