CVE-2020-3840 : What You Need to Know

An off by one issue existed in the handling of racoon configuration files. This issue was addressed through improved bounds checking. Loading a maliciously crafted racoon configuration file may lead to arbitrary code execution.

Understanding CVE-2020-3840

What is CVE-2020-3840?

CVE-2020-3840 is an off by one issue in the handling of racoon configuration files, affecting Apple's iOS, macOS, and tvOS platforms.

The Impact of CVE-2020-3840

The vulnerability could allow an attacker to execute arbitrary code by exploiting a specially crafted racoon configuration file.

Technical Details of CVE-2020-3840

Vulnerability Description

The issue was due to a lack of proper bounds checking in handling racoon configuration files.

Affected Systems and Versions

iOS and iPadOS versions less than 13.3.1
macOS Catalina version less than 10.15.3
tvOS version less than 13.3.1

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking users into loading a malicious racoon configuration file.

Mitigation and Prevention

Immediate Steps to Take

Update affected systems to iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, or tvOS 13.3.1.
Avoid opening racoon configuration files from untrusted sources.

Long-Term Security Practices

Regularly update software and apply patches promptly.
Educate users on safe browsing habits and file handling.

Patching and Updates

Ensure all devices are running the latest versions of iOS, macOS, and tvOS to mitigate the vulnerability.