CVE-2021-30668 : Security Advisory and Response

This article provides insights into CVE-2021-30668, a vulnerability in macOS that could allow bypassing the Login Window during a software update.

Understanding CVE-2021-30668

This CVE highlights a security issue in macOS versions less than 11.4, potentially enabling unauthorized access to a Mac when physical access is available during software updates.

What is CVE-2021-30668?

CVE-2021-30668 discloses a flaw in macOS that could be exploited by an attacker with physical access to bypass the Login Window during a software update, potentially leading to unauthorized system access.

The Impact of CVE-2021-30668

This vulnerability poses a significant security risk as it could allow malicious actors physical access to a Mac to gain unauthorized entry during a critical system update, compromising the user's data and system integrity.

Technical Details of CVE-2021-30668

The following technical aspects shed light on the vulnerability:

Vulnerability Description

Improved checks have been implemented in macOS Big Sur 11.4 to address the issue, ensuring that the Login Window is not bypassed during software updates.

Affected Systems and Versions

macOS versions less than 11.4 are affected, making them vulnerable to exploitation by individuals with physical access to the device during a software update.

Exploitation Mechanism

The vulnerability could be exploited by an adversary physically interacting with the Mac during a software update, leveraging this interaction to bypass the Login Window.

Mitigation and Prevention

To safeguard systems from CVE-2021-30668, users are advised to take the following measures:

Immediate Steps to Take

Update the macOS to version 11.4 or above to eliminate this vulnerability.
Avoid leaving the device unattended during critical system updates to prevent unauthorized access.

Long-Term Security Practices

Implement physical security measures to restrict unauthorized access to Mac devices.
Regularly update the system to the latest versions to patch known security issues.

Patching and Updates

Stay informed about security updates from Apple and promptly apply patches to ensure the security of your macOS environment.