Malicious Code Injection in level_bat_z3n Package - npm Vulnerability
Summary
MAL-2025-105094: Malicious code in level_bat_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The level_bat_z3n package is part of the npm ecosystem, often utilized in JavaScript applications. It is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with various packages. This package, like others in the campaign, is designed to manipulate the npm registry by generating and publishing derivative packages with randomized names, ultimately affecting the integrity of the ecosystem.
Vulnerability Detail
The vulnerability in the level_bat_z3n package stems from its malicious code that modifies the package.json file. This code removes private flags, alters version numbers, and generates random package names, which are then continuously republished to pollute the npm registry. The origin of this issue is linked to the tea.xyz token reward campaign, which incentivizes developers to inflate their reputation scores by creating numerous derivative packages. The ramifications include potential security risks for applications relying on this package, as well as the degradation of the npm registry's quality.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall level_bat_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 the level_bat_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, ensure that your package.json file is monitored for unauthorized changes.
Conclusion
The level_bat_z3n package presents a significant vulnerability due to its malicious code that alters package metadata and pollutes the npm registry. It is crucial for developers to remove this package from their projects and consider using monitoring tools like Vulert to safeguard against future vulnerabilities.
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FAQ
The level_bat_z3n package is an npm package associated with the tea.xyz token reward campaign, known for flooding the npm registry with malicious packages.
The malicious code modifies your package.json file, potentially compromising your application's integrity and security by removing private flags and altering version numbers.
You should uninstall the level_bat_z3n package immediately using npm uninstall level_bat_z3n to mitigate any risks.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using your package-lock.json file. You can check your application for vulnerabilities without any signup at the Vulert playground.
Regularly audit your dependencies, use tools like Vulert for monitoring, and stay informed about known vulnerabilities in the packages you use.
