Malicious Code Injection in Parental Lemming Z3N Package
Summary
MAL-2025-122444: Malicious code in parental_lemming_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The 'parental_lemming_z3n' package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that alters its own package configuration.
Vulnerability Detail
The vulnerability originates from the package's design, which includes autopublish scripts that modify the package.json file. These modifications remove private flags, alter version numbers, and generate random package names, leading to the pollution of the npm registry. The malicious payload can compromise the integrity of the npm ecosystem by flooding it with numerous variants of the package, potentially affecting other developers and users relying on npm for secure package management.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall parental_lemming_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, you can avoid using the 'parental_lemming_z3n' package altogether. If you have dependencies that require it, consider looking for alternative packages that provide similar functionality without the associated risks.
Conclusion
The 'parental_lemming_z3n' package contains malicious code that poses significant risks to developers and the npm ecosystem. It is crucial to remove this package from your projects and monitor for any updates or alternatives. Utilizing tools like Vulert can help maintain the security of your applications.
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FAQ
It is an npm package associated with the tea.xyz token reward campaign, designed to generate and publish derivative packages.
The malicious code can compromise your project's integrity by polluting the npm registry and potentially introducing security risks.
You should uninstall the package immediately and look for alternatives to avoid any security risks.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file.
You can use the Vulert playground at Vulert Scanner to check for vulnerabilities without needing to sign up.
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