CVE-2019-8591 Explained : Impact and Mitigation
Learn about CVE-2019-8591, a type confusion issue in Apple's iOS, macOS, tvOS, and watchOS, allowing unexpected system termination or kernel memory write. Find mitigation steps and affected versions.
A type confusion problem in Apple's iOS, macOS, tvOS, and watchOS has been addressed through improved memory handling.
Understanding CVE-2019-8591
What is CVE-2019-8591?
CVE-2019-8591 is a vulnerability in Apple's operating systems that could allow an application to cause unexpected system termination or write to kernel memory.
The Impact of CVE-2019-8591
The vulnerability could lead to unexpected system crashes or unauthorized access to sensitive kernel memory, posing a security risk to affected devices.
Technical Details of CVE-2019-8591
Vulnerability Description
The issue was resolved by enhancing memory handling in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, and watchOS 5.2.1 to prevent type confusion problems.
Affected Systems and Versions
- iOS versions prior to 12.3
- macOS versions prior to Mojave 10.14.5
- tvOS versions prior to 12.3
- watchOS versions prior to 5.2.1
Exploitation Mechanism
The vulnerability could be exploited by malicious applications to trigger unexpected system crashes or gain unauthorized access to kernel memory.
Mitigation and Prevention
Immediate Steps to Take
- Update affected devices to the latest versions of iOS, macOS, tvOS, and watchOS.
- Avoid downloading and running untrusted applications.
Long-Term Security Practices
- Regularly update software and firmware to patch known vulnerabilities.
- Implement application whitelisting and sandboxing to restrict unauthorized access.
Patching and Updates
Apply security patches and updates provided by Apple to ensure the mitigation of CVE-2019-8591.