Malicious Code Injection in lost_earwig_z3n Package
Summary
MAL-2025-87996: Malicious code in lost_earwig_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The lost_earwig_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development of applications by providing reusable code. However, it has been identified as part of a malicious campaign that exploits npm's publishing mechanisms to inflate developer reputation scores through the creation of derivative packages.
Vulnerability Detail
The vulnerability in the lost_earwig_z3n package stems from its association with a malicious token reward campaign. The package contains scripts designed to automatically modify its own package.json file, removing private flags and changing version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to clutter the npm registry. This not only compromises the integrity of the npm ecosystem but can also lead to potential security risks for developers who inadvertently use these malicious packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall lost_earwig_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 lost_earwig_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can monitor your project for vulnerabilities using tools like Vulert, which can alert you to open-source vulnerabilities in real-time by analyzing your package-lock.json.
Conclusion
The lost_earwig_z3n package poses a significant risk due to its malicious nature, which can compromise the security of applications using it. It is essential to remove this package and monitor your projects for vulnerabilities to maintain a secure development environment.
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FAQ
The lost_earwig_z3n package is an npm package that has been identified as part of a malicious campaign aimed at inflating developer reputation scores.
The vulnerability can lead to the introduction of malicious code into your project, potentially compromising its security and integrity.
You should uninstall the lost_earwig_z3n package immediately and check your project for any other affected packages.
You can use tools like Vulert, which allows you to monitor your project for open-source vulnerabilities in real-time by analyzing your package-lock.json.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
