Malicious Code Injection in silent_lemur_z3n: A Threat to npm Packages
Summary
MAL-2025-108670: Malicious code in silent_lemur_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package silent_lemur_z3n is part of the npm ecosystem, which is widely used for JavaScript package management. It is designed to facilitate the development and sharing of code among developers. However, this package has been identified as part of a malicious campaign that aims to exploit the npm registry by generating and publishing numerous derivative packages with altered metadata, thereby inflating developer reputation scores for token rewards.
Vulnerability Detail
The vulnerability in silent_lemur_z3n originates from its association with the tea.xyz token reward campaign. This package contains scripts that automatically modify the package.json file to remove private flags, change version numbers, and generate random package names. The malicious payload continuously republishes these variants, polluting the npm registry and potentially compromising the integrity of other packages. This can lead to security risks for applications relying on affected packages, as they may inadvertently use compromised versions.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall silent_lemur_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 silent_lemur_z3n package and any other packages associated with the tea.xyz campaign. Regularly audit your npm packages using tools like npm audit to identify and mitigate vulnerabilities.
Conclusion
The silent_lemur_z3n package poses a significant risk due to its malicious code designed to exploit the npm registry. It is essential for developers to remove this package and stay vigilant by monitoring their dependencies for vulnerabilities. Utilizing tools like Vulert can help in maintaining the security of your applications without requiring code access or installation.
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FAQ
silent_lemur_z3n is an npm package that has been identified as part of a malicious campaign aimed at manipulating the npm registry.
The vulnerability can lead to the use of compromised packages, which may introduce security risks and instability in your application.
You should uninstall the package immediately using the command 'npm uninstall silent_lemur_z3n' and audit your project for any other affected packages.
You can use tools like npm audit or services like Vulert, which monitors your package-lock.json for vulnerabilities in real-time.
There is no patch available for silent_lemur_z3n; the recommended action is to uninstall the package.
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