CVE-2021-23363 : Security Advisory and Response

This CVE-2021-23363 article provides insights into a vulnerability in the 'kill-by-port' package before version 0.0.2 that allows arbitrary command execution through attacker-controlled user input. This post covers the impact, technical details, and mitigation strategies.

Understanding CVE-2021-23363

This section delves into the specifics of the CVE-2021-23363 vulnerability.

What is CVE-2021-23363?

The CVE-2021-23363 affects the 'kill-by-port' package prior to version 0.0.2, enabling threat actors to execute arbitrary commands by providing user input to the killByPort function without input sanitization.

The Impact of CVE-2021-23363

The vulnerability in CVE-2021-23363 poses a medium severity risk with a CVSS base score of 6.3. The exploit can be triggered through a low-complexity network attack, potentially leading to unauthorized command execution.

Technical Details of CVE-2021-23363

Explore the technical aspects of the CVE-2021-23363 vulnerability below.

Vulnerability Description

The flaw arises from utilizing the child_process exec function without proper input validation, enabling malicious actors to run arbitrary commands.

Affected Systems and Versions

The issue impacts versions of the 'kill-by-port' package that are older than 0.0.2, leaving them susceptible to arbitrary command injection.

Exploitation Mechanism

By leveraging the killByPort function with unfiltered user input, attackers can craft inputs to execute unauthorized commands, posing a significant security risk.

Mitigation and Prevention

Discover the recommended steps to mitigate and prevent the CVE-2021-23363 vulnerability.

Immediate Steps to Take

Users should update the 'kill-by-port' package to version 0.0.2 or later to prevent potential exploitation. Additionally, refrain from passing unsanitized input to the killByPort function to minimize risks.

Long-Term Security Practices

Implement input validation and sanitization across applications to fortify defenses against arbitrary command injection attacks. Conduct regular security assessments and consider using security tools to identify similar vulnerabilities proactively.

Patching and Updates

Stay informed about security patches and updates for the 'kill-by-port' package to address known vulnerabilities and enhance overall system security.