CVE-2020-9816 Explained : Impact and Mitigation

An out-of-bounds write issue in Apple products was addressed with improved bounds checking. This issue affects iOS, macOS, tvOS, and watchOS versions prior to specific releases, potentially leading to unexpected application termination or arbitrary code execution.

Understanding CVE-2020-9816

This CVE identifier pertains to a security vulnerability in Apple's operating systems that could be exploited through a maliciously crafted PDF file.

What is CVE-2020-9816?

CVE-2020-9816 is an out-of-bounds write issue that was fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, and watchOS 6.2.5.

The Impact of CVE-2020-9816

The vulnerability could allow an attacker to execute arbitrary code or cause an unexpected application termination by tricking a user into opening a specially crafted PDF file.

Technical Details of CVE-2020-9816

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability involves an out-of-bounds write issue that was mitigated by enhancing bounds checking mechanisms.

Affected Systems and Versions

iOS versions prior to 13.5 and iPadOS versions prior to 13.5
macOS versions prior to Catalina 10.15.5
tvOS versions prior to 13.4.5
watchOS versions prior to 6.2.5

Exploitation Mechanism

Opening a maliciously crafted PDF file triggers the vulnerability, potentially leading to unexpected application termination or arbitrary code execution.

Mitigation and Prevention

To address CVE-2020-9816, users and organizations should take the following steps:

Immediate Steps to Take

Update affected devices to the patched versions: iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, and watchOS 6.2.5
Avoid opening PDF files from untrusted or unknown sources

Long-Term Security Practices

Regularly update software and operating systems to the latest versions
Exercise caution when interacting with email attachments or files from unfamiliar sources

Patching and Updates

Apply security patches promptly as they become available to ensure protection against known vulnerabilities