CVE-2020-9891 Explained : Impact and Mitigation

An out-of-bounds read vulnerability in Apple products could allow arbitrary code execution when processing a malicious audio file.

Understanding CVE-2020-9891

What is CVE-2020-9891?

CVE-2020-9891 is an out-of-bounds read vulnerability in Apple's iOS, macOS, tvOS, and watchOS platforms that could be exploited by processing a specially crafted audio file.

The Impact of CVE-2020-9891

The vulnerability could lead to arbitrary code execution on affected devices, posing a significant security risk to users.

Technical Details of CVE-2020-9891

Vulnerability Description

The issue was addressed by enhancing bounds checking in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, and watchOS 6.2.8.

Affected Systems and Versions

iOS versions prior to 13.6 and iPadOS versions prior to 13.6
macOS versions prior to Catalina 10.15.6
tvOS versions prior to 13.4.8
watchOS versions prior to 6.2.8

Exploitation Mechanism

Processing a maliciously crafted audio file triggers the vulnerability, potentially allowing attackers to execute arbitrary code.

Mitigation and Prevention

Immediate Steps to Take

Update affected devices to the latest iOS, macOS, tvOS, and watchOS versions that include the security patches.
Avoid opening or processing audio files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update all Apple devices to ensure they have the latest security fixes.
Exercise caution when downloading or opening files from unfamiliar sources.

Patching and Updates

Apply the necessary security updates provided by Apple to mitigate the CVE-2020-9891 vulnerability.