Critical Malicious Code Vulnerability in internal-lib-vulnerable Package
Summary
MAL-2026-1484: Malicious code in internal-lib-vulnerable (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The internal-lib-vulnerable package is an npm library designed for internal use, providing various functionalities for application development. However, it has been identified as a malicious package that poses significant security risks, including data exfiltration and arbitrary code execution during installation. This vulnerability arises from a preinstall script that executes potentially harmful code, making it imperative for users to be aware of its implications.
Vulnerability Detail
The vulnerability stems from the inclusion of malicious code within the internal-lib-vulnerable package. This code can lead to data exfiltration, allowing attackers to access sensitive information from the user's environment. Additionally, the arbitrary code execution during the installation process via a preinstall script can compromise the integrity of the system. The presence of a suspicious hostname further raises concerns about the package's legitimacy and the potential for exploitation.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall internal-lib-vulnerableIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, avoid using the internal-lib-vulnerable package altogether. If you must use it, consider isolating the environment in which it is installed, such as using Docker containers or virtual machines, to minimize potential damage.
Conclusion
The internal-lib-vulnerable package poses a serious security threat due to its malicious code, which can lead to data exfiltration and arbitrary code execution. It is essential to remove this package from your projects and monitor for any vulnerabilities using tools like Vulert. Stay informed about updates and security advisories to protect your applications.
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FAQ
It is an npm package designed for internal use, but it has been identified as malicious due to its harmful code.
The vulnerability can lead to data exfiltration and arbitrary code execution, compromising your application's security.
Immediately uninstall the package using 'npm uninstall internal-lib-vulnerable' and check for any signs of compromise.
Yes, you can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using your package-lock.json file.
You can use the Vulert playground at Vulert Scanner to check if your application is affected without requiring any signup.
