Malicious Code Injection in printed_jackal_z3n Package
Summary
MAL-2025-98880: Malicious code in printed_jackal_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The printed_jackal_z3n package is part of the npm ecosystem, which is widely used for JavaScript development. This package has been identified as part of a malicious campaign that aims to exploit npm's package publishing system. It is designed to automatically generate and publish derivative packages with randomized names, which can lead to reputation inflation for developers involved in the tea.xyz token reward campaign.
Vulnerability Detail
The vulnerability originates from the malicious intent behind the printed_jackal_z3n package, which modifies the package.json file to remove private flags and alters version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This behavior can lead to security risks, including the potential for dependency confusion and the introduction of untrusted code into projects that rely on this package.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall printed_jackal_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 prevent the installation of this malicious package by using npm's package-lock.json file to lock your dependencies. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.
Conclusion
The printed_jackal_z3n package poses a significant security risk due to its malicious behavior of modifying package files and republishing variants. 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 printed_jackal_z3n package is a malicious npm package that is part of a campaign to inflate developer reputation scores through automated publishing of derivative packages.
This vulnerability can introduce untrusted code into your project, leading to potential security risks and dependency confusion.
You should remove the printed_jackal_z3n package from your project and monitor for any updates or patches that may be released.
Yes, you can use tools like Vulert to monitor your dependencies for vulnerabilities and ensure that you are using secure versions of packages.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
