CVE-2020-9956 Explained : Impact and Mitigation
Learn about CVE-2020-9956, an out-of-bounds read vulnerability in Apple's macOS, tvOS, watchOS, iOS, and iPadOS. Processing a malicious font file could lead to arbitrary code execution. Find mitigation steps and updates here.
An out-of-bounds read vulnerability affecting Apple's tvOS, watchOS, iOS and iPadOS, and macOS versions has been identified and fixed. Processing a maliciously crafted font file could lead to arbitrary code execution.
Understanding CVE-2020-9956
This CVE addresses an out-of-bounds read vulnerability in various Apple operating systems that could be exploited through a malicious font file.
What is CVE-2020-9956?
CVE-2020-9956 is an out-of-bounds read vulnerability that could allow an attacker to execute arbitrary code by tricking a user into processing a specially crafted font file.
The Impact of CVE-2020-9956
The vulnerability could lead to arbitrary code execution on affected systems, potentially compromising the security and integrity of the devices.
Technical Details of CVE-2020-9956
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability involves an out-of-bounds read issue that was mitigated through enhanced input validation in the affected Apple products.
Affected Systems and Versions
- tvOS versions less than 14.0
- watchOS versions less than 7.0
- iOS and iPadOS versions less than 14.0
- macOS versions less than 11.0 and 11.1
Exploitation Mechanism
The vulnerability can be exploited by processing a specially crafted font file, triggering the out-of-bounds read and potentially leading to arbitrary code execution.
Mitigation and Prevention
To address CVE-2020-9956 and enhance system security, follow these mitigation steps:
Immediate Steps to Take
- Update affected systems to the fixed versions: macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.0, iOS 14.0, and iPadOS 14.0
- Avoid opening or processing font files from untrusted or unknown sources
Long-Term Security Practices
- Regularly update software and operating systems to the latest versions
- Implement security best practices and guidelines to prevent similar vulnerabilities
Patching and Updates
- Apply security patches and updates provided by Apple promptly to ensure protection against known vulnerabilities