Process-memory disclosure via crafted font state mishandling
Published Sep 8, 2021 · Updated Aug 3, 2024
Information disclosure in Apple CoreText across affected products allows remote attackers to read process memory through a crafted font. CoreText mishandles internal state while processing untrusted font data; Apple has not disclosed the erroneous transition or affected function. Exploitation requires a target process to handle the font, and the documented consequence is process-memory disclosure without data modification or service interruption.
Summary
What happened
Information disclosure in Apple CoreText across affected products allows remote attackers to read process memory through a crafted font. CoreText mishandles internal state while processing untrusted font data; Apple has not disclosed the erroneous transition or affected function. Exploitation requires a target process to handle the font, and the documented consequence is process-memory disclosure without data modification or service interruption.
The record
- CVE
- CVE-2021-1811
- Published
- Sep 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Apple
- Product
- iTunes for Windows
- Classifications
- Unavailable
- Attack vector
- network
- 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?
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- Affected versionversion=unspecified <12.11
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
No sourced classifications are available.
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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