CVE-2021-40054 : Exploit Details and Defense Strategies

This article provides details about an integer underflow vulnerability in Huawei's EMUI and Magic UI that could impact integrity.

Understanding CVE-2021-40054

What is CVE-2021-40054?

There is an integer underflow vulnerability in the atcmdserver module, which if successfully exploited, could have integrity implications.

The Impact of CVE-2021-40054

The vulnerability may lead to integrity issues within affected systems.

Technical Details of CVE-2021-40054

Vulnerability Description

Type: Integer underflow vulnerability
Module: atcmdserver
Impact: Integrity compromise

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability resides in the atcmdserver module could be exploited to trigger an integer underflow, potentially impacting the integrity of the system.

Mitigation and Prevention

Immediate Steps to Take

Update your Huawei device to the latest software version available.
Follow the recommendations provided by Huawei regarding this vulnerability.

Long-Term Security Practices

Regularly check for security updates and patches released by Huawei.
Implement strict access control measures to prevent unauthorized system access.

Patching and Updates

To address this vulnerability, promptly apply any patches or updates provided by Huawei to secure your systems and prevent exploitation.