CVE-2021-40035 : What You Need to Know

The vulnerability affects Huawei products running EMUI, Magic UI, and HarmonyOS, potentially leading to function stability issues.

Understanding CVE-2021-40035

This CVE involves a buffer overflow vulnerability in the Samba server of Huawei smartphones.

What is CVE-2021-40035?

The vulnerability stems from a boundary error in the file management module of smartphones, allowing attackers to trigger a buffer overflow.

The Impact of CVE-2021-40035

Successful exploitation may compromise the function stability of affected devices, potentially leading to a denial of service or arbitrary code execution.

Technical Details of CVE-2021-40035

The specifics of the vulnerability and affected systems are outlined below:

Vulnerability Description

Buffer overflow vulnerability due to a boundary error with the Samba server in Huawei smartphones.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers exploit the boundary error with the Samba server to trigger a buffer overflow, compromising system stability.

Mitigation and Prevention

It is crucial to take immediate and long-term security measures to safeguard against this vulnerability:

Immediate Steps to Take

Apply security patches provided by Huawei as soon as they are available.
Monitor Huawei's security bulletins for updates related to CVE-2021-40035.

Long-Term Security Practices

Implement network segmentation to contain potential attacks.
Regularly update and patch all software and firmware on Huawei devices.

Patching and Updates

Ensure that all affected devices are updated with the latest security patches from Huawei to mitigate the vulnerability.