CVE-2023-4753 : Security Advisory and Response

This CVE record details a vulnerability in OpenHarmony v3.2.1 and prior versions that can be exploited by local attackers to crash the kernel due to a system call function usage error.

Understanding CVE-2023-4753

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2023-4753.

What is CVE-2023-4753?

CVE-2023-4753 refers to a vulnerability in OpenHarmony v3.2.1 and earlier versions where there is a system call function usage error. This error can be leveraged by local attackers to cause a kernel crash by providing erroneous input. The vulnerability falls under CWE-20: Improper Input Validation.

The Impact of CVE-2023-4753

The impact of CVE-2023-4753 is rated as low severity according to the CVSS v3.1 scoring. The attack complexity is low, the attack vector is local, and the privileges required for exploitation are also low. While the confidentiality impact is none, the integrity impact is low, and the availability impact is also rated as low.

Technical Details of CVE-2023-4753

Below are technical details explaining the vulnerability, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in OpenHarmony v3.2.1 and earlier versions stems from a system call function usage error. Local attackers can utilize this error to crash the kernel by providing incorrect input.

Affected Systems and Versions

The vulnerability impacts OpenHarmony version 3.2.0 and before, with version 3.2.1 being specifically listed as affected. Users of these versions should take immediate action to mitigate the risk.

Exploitation Mechanism

Local attackers can exploit the system call function usage error in OpenHarmony v3.2.1 and prior versions to crash the kernel by supplying erroneous input. This could lead to a denial of service or potentially allow an attacker to escalate privileges.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2023-4753 is crucial for maintaining system security.

Immediate Steps to Take

It is recommended that users of affected versions of OpenHarmony, specifically v3.2.0 and earlier, apply necessary patches or updates provided by the vendor. Additionally, monitoring for any unusual system behavior can help detect potential exploitation attempts.

Long-Term Security Practices

Implementing secure coding practices, regular security audits, and staying informed about software vulnerabilities can contribute to long-term security resilience against such vulnerabilities.

Patching and Updates

OpenHarmony users should promptly apply patches and updates released by the vendor to address the system call function usage error in v3.2.1 and prior versions. Regularly checking for updates and maintaining up-to-date software can help prevent exploitation of known vulnerabilities.

By following these mitigation strategies and staying informed about security best practices, users can enhance the security posture of their systems and protect against vulnerabilities like CVE-2023-4753.