CVE-2020-27931 Explained : Impact and Mitigation
Learn about CVE-2020-27931, a memory corruption issue in font file processing that could lead to arbitrary code execution. Find out affected systems, exploitation details, and mitigation steps.
A memory corruption issue in font file processing was identified and fixed by Apple in various operating systems.
Understanding CVE-2020-27931
What is CVE-2020-27931?
A memory corruption issue in font file processing that could lead to arbitrary code execution.
The Impact of CVE-2020-27931
Processing a maliciously crafted font file may result in arbitrary code execution.
Technical Details of CVE-2020-27931
Vulnerability Description
The vulnerability stemmed from a memory corruption issue in font file processing, which Apple addressed with enhanced input validation.
Affected Systems and Versions
- tvOS: Less than version 14.0
- watchOS: Less than version 7.0
- iOS and iPadOS: Less than version 14.0
- macOS: Less than versions 11.0 and 11.1
Exploitation Mechanism
Processing a specially crafted font file could trigger the vulnerability, potentially leading to arbitrary code execution.
Mitigation and Prevention
Immediate Steps to Take
- Update affected systems to the fixed versions: iOS 14.0, iPadOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0
Long-Term Security Practices
- Regularly update software and operating systems
- Exercise caution when handling unknown or untrusted font files
Patching and Updates
Apply the necessary security updates provided by Apple to address the vulnerability.