Malicious Code Injection in neutral_emu_z3n: A Threat to npm Ecosystem
Summary
MAL-2025-98834: Malicious code in neutral_emu_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package 'neutral_emu_z3n' is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to exploit the npm registry by flooding it with derivative packages. These packages are designed to inflate developer reputation scores through automated publishing scripts, making them a significant threat to the integrity of the npm ecosystem.
Vulnerability Detail
The vulnerability in 'neutral_emu_z3n' originates from its involvement in a token reward campaign that utilizes autopublish scripts to create and publish numerous derivative packages with randomized names. This malicious activity modifies the package.json file by removing private flags, altering version numbers, and generating random package names, which leads to pollution of the npm registry. The ramifications include potential security risks for developers who unknowingly use these compromised packages, as well as damage to the reputation of the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall neutral_emu_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you can avoid using 'neutral_emu_z3n' and any other packages that may be part of the malicious campaign. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.
Conclusion
The 'neutral_emu_z3n' package poses a significant threat due to its malicious code designed to exploit the npm ecosystem. It is crucial for developers to be aware of such vulnerabilities and take proactive measures to secure their projects. By removing affected packages and utilizing monitoring tools like Vulert, developers can safeguard their applications against similar threats.
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FAQ
'neutral_emu_z3n' is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.
Using 'neutral_emu_z3n' can lead to security risks and pollution of the npm registry, potentially compromising your project's integrity.
You should uninstall 'neutral_emu_z3n' immediately using the command 'npm uninstall neutral_emu_z3n'.
Regularly check for updates to your packages, use trusted sources, and consider using tools like Vulert to monitor for vulnerabilities.
Vulert monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file. You can check for vulnerabilities in your application without any installation.
