CVE-2021-39996 Explained : Impact and Mitigation

This CVE entry is about a Heap-based buffer overflow vulnerability in smartphones, affecting EMUI, Magic UI, and HarmonyOS.

Understanding CVE-2021-39996

This CVE describes a critical vulnerability in the NFC module of smartphones that could lead to a heap-based buffer overflow.

What is CVE-2021-39996?

Vulnerability: Heap-based buffer overflow in NFC module
Impact: Memory overflow on successful exploitation

The Impact of CVE-2021-39996

The vulnerability could be exploited to cause memory overflow, leading to potential system crashes or control over the affected device.

Technical Details of CVE-2021-39996

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Heap-based buffer overflow vulnerability in the NFC module
Found in smartphones running EMUI, Magic UI, and HarmonyOS

Affected Systems and Versions

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

Exploitation Mechanism

Successful exploitation results in memory overflow
Attackers can potentially gain control over the device

Mitigation and Prevention

Protecting systems from CVE-2021-39996 is crucial for security. Here are the necessary steps to mitigate and prevent exploitation.

Immediate Steps to Take

Update the affected devices to patched versions
Implement security measures to block potential attacks targeting the NFC module

Long-Term Security Practices

Regularly update devices and applications to prevent vulnerabilities
Monitor security bulletins and patches released by the vendor

Patching and Updates

Apply security patches provided by Huawei for EMUI, Magic UI, and HarmonyOS devices