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CVE-2021-21388 : Security Advisory and Response

Learn about CVE-2021-21388, a high-severity command injection vulnerability in systeminformation library for node.js. Find out how to mitigate this issue and protect your systems from attacks.

A command injection vulnerability has been discovered in the systeminformation library for node.js versions prior to 5.6.4. This vulnerability allows attackers to execute arbitrary commands on the host system. It is crucial to update to version 5.6.4 or later to mitigate this issue.

Understanding CVE-2021-21388

This section sheds light on the nature and impact of the command injection vulnerability in the systeminformation library.

What is CVE-2021-21388?

The systeminformation library is an open-source system and OS information library for node.js. The vulnerability stems from improper input validation, allowing attackers to inject malicious commands.

The Impact of CVE-2021-21388

The vulnerability has a CVSS v3.1 base score of 8.9, classifying it as high severity. Attack complexity is low, but the availability and confidentiality impacts are high.

Technical Details of CVE-2021-21388

Explore the technical aspects and implications of the CVE-2021-21388 vulnerability.

Vulnerability Description

The vulnerability arises due to a lack of proper parameter checks on user input, leading to command injection. It has been addressed in version 5.6.4 with enhanced input validation.

Affected Systems and Versions

Systems running systeminformation versions prior to 5.6.4 are vulnerable to command injection.

Exploitation Mechanism

Attackers exploit the vulnerability by passing malicious commands through service parameters such as si.inetLatency() and si.services().

Mitigation and Prevention

Discover ways to mitigate the CVE-2021-21388 vulnerability and prevent potential security breaches.

Immediate Steps to Take

Update to systeminformation version 5.6.4 or higher to eliminate the vulnerability. If an update is not feasible, sanitize all service parameters to allow only strings and reject arrays.

Long-Term Security Practices

Implement strict input validation practices across all user inputs and service parameters to prevent future command injection vulnerabilities.

Patching and Updates

Regularly check for security patches and updates for systeminformation to ensure that known vulnerabilities are promptly addressed.

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