CVE-2021-39970 : What You Need to Know

Huawei HarmonyOS has an Improper Input Validation vulnerability that affects version 2.0, allowing the creation of files with system app permission.

Understanding CVE-2021-39970

HwPCAssistant application in Huawei HarmonyOS is susceptible to improper input validation, potentially leading to unauthorized file creation.

What is CVE-2021-39970?

The CVE-2021-39970 vulnerability in Huawei HarmonyOS relates to a flaw in HwPCAssistant that can be exploited to create files with elevated system app permissions.

The Impact of CVE-2021-39970

Successful exploitation of this vulnerability may result in the unauthorized creation of files with system app permissions, posing a security risk to affected devices.

Technical Details of CVE-2021-39970

HwPCAssistant in Huawei HarmonyOS is affected by an Improper Input Validation vulnerability, potentially abused to create files with system app permissions.

Vulnerability Description

The vulnerability in HwPCAssistant enables threat actors to exploit improper input validation, allowing for the unauthorized creation of files with system app permissions.

Affected Systems and Versions

Product: HarmonyOS
Vendor: Huawei
Version: 2.0

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to create files on the system with elevated permissions, compromising device security.

Mitigation and Prevention

To secure affected systems from CVE-2021-39970:

Immediate Steps to Take

Update HwPCAssistant to a patched version provided by Huawei.
Monitor system files for any unauthorized changes.
Implement network security measures to detect and prevent unauthorized access.

Long-Term Security Practices

Regularly update all software and firmware on the device.
Conduct regular security audits to detect and mitigate vulnerabilities.

Patching and Updates

Apply security patches promptly as released by Huawei.