Malicious Code Injection in greasy_fly_z3n Package - npm Vulnerability
Summary
MAL-2025-94746: Malicious code in greasy_fly_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The greasy_fly_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, often with randomized names, to inflate developer reputation scores for token rewards. The package's functionality is compromised by malicious scripts that alter its metadata.
Vulnerability Detail
The vulnerability in the greasy_fly_z3n package originates from its inclusion in a campaign that floods the npm registry with malicious packages. The malicious payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of these variants. This behavior not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages, potentially leading to security breaches in their applications.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall greasy_fly_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 greasy_fly_z3n package altogether. If it is a dependency, consider replacing it with a more secure alternative that does not exhibit malicious behavior.
Conclusion
The greasy_fly_z3n package poses a significant risk due to its malicious code that alters package metadata and floods the npm registry. It is crucial for developers to remove this package and monitor their dependencies for vulnerabilities to maintain the security of their applications.
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FAQ
The greasy_fly_z3n package is an npm package involved in a token reward campaign, designed to generate and publish derivative packages automatically.
The vulnerability can lead to the introduction of malicious code into your application, potentially compromising its security and integrity.
You should uninstall the greasy_fly_z3n package immediately using the command npm uninstall greasy_fly_z3n.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file.
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