Malicious Code Injection in lost_junglefowl_z3n Package
Summary
MAL-2025-87998: Malicious code in lost_junglefowl_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The lost_junglefowl_z3n package is part of the npm ecosystem, typically used for various JavaScript applications. It is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with packages that manipulate developer reputation scores. This package, like others in the campaign, contains scripts that automatically publish derivative packages, potentially compromising the integrity of the npm registry.
Vulnerability Detail
The vulnerability in the lost_junglefowl_z3n package stems from its malicious code that modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior is designed to inflate developer reputation scores fraudulently and pollute the npm registry with numerous derivative packages. The origin of this vulnerability is linked to the tea.xyz token reward campaign, which exploits npm's publishing mechanisms.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall lost_junglefowl_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 prevent the installation of this package by using npm's package-lock.json file to monitor dependencies. Ensure that your project does not include lost_junglefowl_z3n in its dependencies.
Conclusion
The lost_junglefowl_z3n package contains malicious code that poses a significant risk to applications using it. It is crucial to remove this package and monitor for any updates. Utilizing tools like Vulert can help keep your application secure by identifying vulnerabilities in real-time.
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FAQ
It is an npm package associated with the tea.xyz token reward campaign, known for publishing numerous derivative packages.
The vulnerability can lead to the pollution of the npm registry and compromise the integrity of your application's dependencies.
You should remove the lost_junglefowl_z3n package from your project and monitor for any updates or patches.
Yes, you can use Vulert's playground at Vulert Scanner to check your application for vulnerabilities without needing to sign up.
Vulert is a tool that monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file.
