CVE-2021-40055 : What You Need to Know

A man-in-the-middle attack vulnerability during system update download in recovery mode affecting Huawei devices.

Understanding CVE-2021-40055

This CVE relates to a critical security issue on Huawei's EMUI, Magic UI, and HarmonyOS.

What is CVE-2021-40055?

The vulnerability allows potential integrity compromise during system update downloads due to a man-in-the-middle attack.

The Impact of CVE-2021-40055

Successful exploitation of this vulnerability may result in compromising the integrity of the affected devices during system updates.

Technical Details of CVE-2021-40055

The technical aspects of this CVE include:

Vulnerability Description

Man-in-the-middle attack vulnerability during system update download in recovery mode.

Affected Systems and Versions

EMUI by Huawei, versions affected: 12.0.0, 11.0.1, 11.0.0, 10.1.1, 10.1.0, 10.0.0
Magic UI by Huawei, versions affected: 4.0.0, 3.1.1, 3.1.0, 3.0.0
HarmonyOS by Huawei, version affected: 2.0

Exploitation Mechanism

The vulnerability is exploited through a man-in-the-middle attack during the download of system updates in recovery mode.

Mitigation and Prevention

Taking immediate and long-term precautionary measures is crucial to mitigate the risks posed by CVE-2021-40055.

Immediate Steps to Take

Update the affected Huawei devices to the latest secure versions.
Avoid downloading system updates over unsecured networks.
Implement additional security measures to prevent man-in-the-middle attacks.

Long-Term Security Practices

Regularly monitor for security updates and patches from Huawei.
Educate users on secure update practices and cybersecurity awareness.

Patching and Updates

Ensure timely installation of security patches provided by Huawei to address the vulnerability.