Code execution via faulty FontParser state management
Published Sep 8, 2021 · Updated Aug 4, 2024
Code execution in FontParser in Apple Security Update Catalina before 2021-002 allows attackers to run code via a crafted font file. FontParser mishandles state while processing untrusted font data; Apple has not disclosed the faulty function or state transition. Exploitation requires the target to process a malicious font file and yields code execution in the parsing process's security context.
Summary
What happened
Code execution in FontParser in Apple Security Update Catalina before 2021-002 allows attackers to run code via a crafted font file. FontParser mishandles state while processing untrusted font data; Apple has not disclosed the faulty function or state transition. Exploitation requires the target to process a malicious font file and yields code execution in the parsing process's security context.
The record
- CVE
- CVE-2020-27942
- Published
- Sep 8, 2021
- Updated
- Aug 4, 2024
- Vendor
- Apple
- Product
- Security Update Catalina
- Classifications
- T1203
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 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 <2021
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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