Malicious Code Injection in exceptional_lemming_dumbs Package
Summary
MAL-2025-102317: Malicious code in exceptional_lemming_dumbs (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The exceptional_lemming_dumbs package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to provide developers with tools and functionalities to enhance their applications. However, it has been identified as part of a malicious campaign that aims to inflate developer reputation scores through the generation of derivative packages with randomized names.
Vulnerability Detail
The vulnerability in the exceptional_lemming_dumbs package originates from its association with the tea.xyz token reward campaign. The package contains malicious scripts that modify the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior leads to the continuous republishing of variants, which pollutes the npm registry and can compromise the integrity of applications relying on this package.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall exceptional_lemming_dumbsIf 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 exceptional_lemming_dumbs package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can use the following command to audit your npm packages for vulnerabilities: 'npm audit'.
Conclusion
The exceptional_lemming_dumbs package poses a significant risk due to its malicious code that modifies package configurations and republishing behavior. It is crucial for developers to remove this package and monitor their applications for vulnerabilities to maintain security and integrity.
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FAQ
It is an npm package that has been identified as part of a malicious campaign aimed at inflating developer reputation scores.
The vulnerability can lead to the pollution of the npm registry and compromise the integrity of your application by introducing malicious code.
You should uninstall the exceptional_lemming_dumbs package immediately and check for any dependencies that may rely on it.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just package-lock.json.
You can use the Vulert playground at Vulert Scanner to check if your application is affected without needing to sign up.
