Malicious Code Injection in interior_emu_z3n Package: A Threat to npm Users
Summary
MAL-2025-95092: Malicious code in interior_emu_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The interior_emu_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with malicious packages. These packages often contain scripts designed to manipulate package metadata and inflate developer reputation scores, making them a significant threat to developers and users alike.
Vulnerability Detail
The vulnerability in the interior_emu_z3n package stems from its inclusion in a campaign that deploys malicious scripts (such as auto.js and autopublish.js) to alter package.json files. These scripts remove private flags, change version numbers, and generate random package names, leading to the pollution of the npm registry. This not only compromises the integrity of the affected packages but also poses a risk to developers who may unknowingly use these compromised packages in their projects.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall interior_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 the interior_emu_z3n package and look for alternative packages that provide similar functionality without the associated risks. 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 interior_emu_z3n package poses a significant risk due to its malicious code designed to manipulate npm package metadata. It is crucial for developers to remove this package from their projects and utilize tools like Vulert to monitor for vulnerabilities. Staying informed and proactive is key to maintaining the security of your applications.
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FAQ
The interior_emu_z3n package is an npm package that is part of a malicious campaign aimed at manipulating package metadata for token rewards.
This vulnerability can lead to the inclusion of malicious code in your project, potentially compromising its security and integrity.
If you have installed the interior_emu_z3n package, you should uninstall it immediately using 'npm uninstall interior_emu_z3n'.
Yes, tools like Vulert can help monitor your project for open-source vulnerabilities in real-time using just the package-lock.json file.
You can check if your application is affected by this vulnerability using the Vulert playground at Vulert Scanner without needing to sign up.
