CVE-2021-46839 : Exploit Details and Defense Strategies

The HW_KEYMASTER module has a vulnerability of missing bounds check on length. Exploiting this vulnerability may cause malicious data construction leading to out-of-bounds access.

Understanding CVE-2021-46839

The vulnerability identified in the HW_KEYMASTER module of Huawei may have severe consequences if exploited.

What is CVE-2021-46839?

The CVE-2021-46839 vulnerability involves a missing bounds check on length in the HW_KEYMASTER module, potentially allowing attackers to construct malicious data leading to out-of-bounds access.

The Impact of CVE-2021-46839

Exploiting this vulnerability can result in unauthorized and malicious access to sensitive information, compromising the security of affected systems.

Technical Details of CVE-2021-46839

A deeper look into the technical aspects of the CVE-2021-46839 vulnerability.

Vulnerability Description

The HW_KEYMASTER module within Huawei systems lacks a proper bounds check on length, opening up the possibility for malformed data construction and subsequent out-of-bounds access.

Affected Systems and Versions

Vendor: Huawei
Products:
HarmonyOS Version 2.0 (Affected)
EMUI Versions 12.0.0 and 11.0.1 (Affected)

Exploitation Mechanism

The vulnerability can be exploited by crafting specific data to trigger the missing bounds check and achieve out-of-bounds access to system resources.

Mitigation and Prevention

Understanding how to mitigate and prevent potential exploits of CVE-2021-46839.

Immediate Steps to Take

Implement patches provided by Huawei promptly
Monitor network traffic and system logs for any suspicious activities
Restrict access to vulnerable systems
Stay informed about security updates from Huawei

Long-Term Security Practices

Regular security assessments and audits of system components
Employee training on identifying and reporting potential security threats

Patching and Updates

Apply the latest security patches released by Huawei to address the vulnerability