CVE-2022-43662 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2022-43662, a vulnerability identified in the OpenHarmony operating system.

Understanding CVE-2022-43662

CVE-2022-43662 is a vulnerability found in the kernel subsystem within OpenHarmony-v3.1.4 and earlier versions in kernel_liteos_a. The issue arises when calling SysTimerGettime, leading to a kernel stack overflow vulnerability.

What is CVE-2022-43662?

The vulnerability in the kernel subsystem of OpenHarmony allows 4 bytes of padding data from the kernel stack to be copied to user space incorrectly and leaked, resulting in a potential security risk.

The Impact of CVE-2022-43662

The impact of CVE-2022-43662 is classified as medium severity. It can lead to resource leak exposure, as identified by CAPEC-131. The vulnerability affects systems running OpenHarmony versions 3.1.4, 3.0.6, and 1.1.5.

Technical Details of CVE-2022-43662

The vulnerability is classified under CWE-120, representing a buffer copy without checking the size of the input, also known as a classic buffer overflow. The CVSS v3.1 score for this vulnerability is 4, indicating a medium-severity issue with low attack complexity and local attack vector.

Vulnerability Description

The vulnerability in kernel_liteos_a allows a kernel stack overflow when calling SysTimerGettime, resulting in the incorrect copying of 4 bytes of padding data to user space.

Affected Systems and Versions

OpenHarmony versions 3.1.4, 3.0.6, and 1.1.5 are affected by this vulnerability in the kernel subsystem.

Exploitation Mechanism

The vulnerability can be exploited by attackers to leak sensitive information due to the incorrect handling of data copied from the kernel stack.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2022-43662 within OpenHarmony systems.

Immediate Steps to Take

Ensure that systems running OpenHarmony versions 3.1.4 and earlier are updated with the necessary patches to mitigate the vulnerability. Review access controls and monitor for any unusual activity.

Long-Term Security Practices

Implement secure coding practices, conduct regular security assessments, and stay informed about security updates and patches released by OpenHarmony.

Patching and Updates

Stay informed about security advisories from OpenHarmony and promptly apply patches to address known vulnerabilities in the kernel subsystem.