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CVE-2022-41802 : Vulnerability Insights and Analysis

Learn about CVE-2022-41802, a medium-severity kernel stack overflow vulnerability in OpenHarmony's kernel_liteos_a subsystem versions 3.1.0, 3.0.0, and 1.1.0. Find out the impacts, technical details, and mitigation steps.

This article provides detailed information about CVE-2022-41802, a vulnerability in the kernel subsystem of OpenHarmony affecting versions 3.1.0, 3.0.0, and 1.1.0.

Understanding CVE-2022-41802

CVE-2022-41802 is a kernel stack overflow vulnerability in the kernel_liteos_a subsystem of OpenHarmony versions before v3.1.4. The issue arises when calling SysClockGetres, leading to incorrect copying and leakage of 4 bytes of padding data from the kernel stack to user space.

What is CVE-2022-41802?

The vulnerability in the kernel subsystem of OpenHarmony allows for a kernel stack overflow when executing SysClockGetres, resulting in the improper transfer of padding data to user space.

The Impact of CVE-2022-41802

CVE-2022-41802 has a CVSS v3.1 base score of 4, indicating a medium severity issue. It can potentially lead to resource leak exposure (CAPEC-131) due to the incorrect handling of kernel stack data.

Technical Details of CVE-2022-41802

The following key technical details outline the specifics of CVE-2022-41802:

Vulnerability Description

The vulnerability involves a kernel stack overflow in the kernel_liteos_a subsystem, allowing for the leakage of 4 bytes of padding data to user space.

Affected Systems and Versions

OpenHarmony versions 3.1.4 and prior, including 3.1.0, 3.0.0, and 1.1.0, are impacted by this vulnerability in the kernel subsystem.

Exploitation Mechanism

Exploiting CVE-2022-41802 involves triggering the SysClockGetres function in the kernel_liteos_a subsystem to overflow the kernel stack and leak sensitive data.

Mitigation and Prevention

To address CVE-2022-41802, consider the following mitigation strategies:

Immediate Steps to Take

        Update OpenHarmony to version 3.1.4 or newer to apply the necessary security patches.
        Monitor for any unauthorized access attempts or unusual system behavior.

Long-Term Security Practices

        Implement secure coding practices to prevent buffer overflow vulnerabilities.
        Regularly update and patch software to address known security issues.

Patching and Updates

Stay informed about security updates and advisories from OpenHarmony to promptly address any new vulnerabilities.

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