Malicious Code Injection in messi-buysa-butsa Package
Summary
MAL-2025-160299: Malicious code in messi-buysa-butsa (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The messi-buysa-butsa package is part of a broader ecosystem on npm, often associated with token reward campaigns. These packages are designed to generate and publish derivative versions automatically, which can inflate developer reputation scores. However, this functionality has been exploited, leading to the introduction of malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability originates from the malicious intent behind the messi-buysa-butsa package, which modifies the package.json file to remove private flags and alters version numbers. It generates random package names, primarily themed around Indonesian culture, and continuously republishes variants to pollute the npm registry. This behavior can lead to significant security risks, including the potential for unauthorized access to sensitive data and the degradation of the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall messi-buysa-butsaIf 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 messi-buysa-butsa package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can monitor your dependencies using tools like Vulert to receive alerts for any open-source vulnerabilities.
Conclusion
The messi-buysa-butsa package poses a significant security risk due to its malicious code injection capabilities. It is crucial for developers to remove this package and monitor their dependencies for vulnerabilities. Utilizing tools like Vulert can help maintain the security of your applications.
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FAQ
It is an npm package that is part of a token reward campaign, designed to generate and publish derivative packages automatically.
The vulnerability can lead to unauthorized modifications of your package.json file and the potential for malicious code execution within your application.
You can use the Vulert platform to monitor your package-lock.json file for vulnerabilities without needing to install any software.
You should uninstall the package immediately and check for any other dependencies that may have been affected.
Yes, Vulert provides real-time monitoring and alerts for open-source vulnerabilities using just your package-lock.json file.
