CVE-2022-45126 Explained : Impact and Mitigation
Learn about CVE-2022-45126, a kernel stack overflow vulnerability in OpenHarmony's kernel subsystem. Understand its impact, technical details, affected versions, and mitigation steps.
This article provides detailed information about CVE-2022-45126, a kernel stack overflow vulnerability in OpenHarmony's kernel subsystem.
Understanding CVE-2022-45126
CVE-2022-45126 is a security vulnerability discovered in OpenHarmony's kernel subsystem, specifically in kernel_liteos_a, affecting versions up to 3.1.4.
What is CVE-2022-45126?
The vulnerability arises when calling SysClockGettime, leading to a kernel stack overflow. This results in 4 bytes of padding data from the kernel stack being incorrectly copied to user space, causing a leak.
The Impact of CVE-2022-45126
The impact of CVE-2022-45126 is categorized under CAPEC-131 (Resource Leak Exposure). It poses a medium severity risk with a base score of 4 according to CVSS v3.1 metrics.
Technical Details of CVE-2022-45126
The following technical details shed light on the vulnerability:
Vulnerability Description
The vulnerability in the OpenHarmony kernel_liteos_a subsystem allows for a kernel stack overflow, leading to the leakage of critical kernel stack data to user space.
Affected Systems and Versions
OpenHarmony versions up to 3.1.4, 3.0.6, and 1.1.5 are affected by this vulnerability in the kernel_liteos_a subsystem.
Exploitation Mechanism
The vulnerability is exploited by triggering the specific function call to SysClockGettime, causing the incorrect copying of kernel stack data to user space.
Mitigation and Prevention
Understanding how to mitigate and prevent CVE-2022-45126 is crucial for maintaining system security.
Immediate Steps to Take
Immediate steps include applying patches provided by OpenHarmony to address the vulnerability in affected systems.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and staying updated on security advisories are essential for long-term security.
Patching and Updates
Regularly updating OpenHarmony to the latest versions and applying security patches is vital to prevent exploitation of the CVE-2022-45126 vulnerability.