Malicious Code Injection in ultimate_worm_z3n: A Threat to npm Ecosystem
Summary
MAL-2025-109971: Malicious code in ultimate_worm_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package 'ultimate_worm_z3n' is part of a series of malicious npm packages that emerged during the tea.xyz token reward campaign. These packages are designed to inflate developer reputation scores by generating and publishing numerous derivative packages with randomized names. The malicious nature of this package lies in its ability to modify critical files and republish variants, thereby polluting the npm registry.
Vulnerability Detail
The vulnerability in 'ultimate_worm_z3n' originates from its inclusion in a malicious campaign that utilizes autopublish scripts to manipulate package.json files. This manipulation removes private flags, alters version numbers, and generates random package names, leading to a significant risk of registry pollution and potential exploitation by malicious actors. The continuous republishing of these variants can compromise the integrity of the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall ultimate_worm_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, you can avoid using the 'ultimate_worm_z3n' package and monitor your project for any unintended dependencies that may have been introduced. Additionally, consider using tools like Vulert to monitor your package-lock.json for vulnerabilities.
Conclusion
The 'ultimate_worm_z3n' package poses a significant threat to the npm ecosystem due to its malicious intent to manipulate package data and republish variants. It is crucial for developers to be vigilant, remove such packages, and utilize monitoring tools like Vulert to safeguard their projects.
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FAQ
The ultimate_worm_z3n package is a malicious npm package that is part of a campaign to inflate developer reputation scores by generating and publishing numerous derivative packages.
This vulnerability can lead to the pollution of the npm registry, potentially compromising the integrity of your project and exposing it to further risks.
You can use the Vulert platform to monitor your package-lock.json for vulnerabilities without requiring any code access or installation.
You should uninstall the package immediately using 'npm uninstall ultimate_worm_z3n' and review your project for any other potentially malicious dependencies.
Yes, regularly updating your dependencies, using tools like Vulert for monitoring, and reviewing your package-lock.json can help prevent similar vulnerabilities.
