Malicious Code in ultratool (PyPI)

ultratool Updated 02 Oct 2025

Summary

23/02/2023
CRITICAL
No i
Critical
Not published

MAL-2023-7771: Malicious code in ultratool (PyPI). Affected versions are not published. No fix is published. How to fix ↓

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Background

ultratool is a package available on PyPI that provides various tools and utilities for developers. It is commonly used in Python projects for tasks such as data manipulation, file handling, and system administration. However, the ultratool package has been found to contain malicious code, posing a significant security risk to projects that depend on it.

Vulnerability Detail

The ultratool package has been compromised by the EsqueleSquad group, who published nearly 6000 malicious PyPi and NPM packages. These packages execute spyware and information-stealing malware. The specific vulnerability in ultratool allows attackers to gain unauthorized access to sensitive information, compromise the integrity of the system, and potentially execute arbitrary code. This can lead to data breaches, unauthorized access to user accounts, and other malicious activities.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

pip uninstall ultratool

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

There is no known workaround for this vulnerability. It is essential to take immediate action by removing the ultratool package and following the recommended steps to mitigate the risk.

Conclusion

The presence of malicious code in the ultratool package poses a significant security risk to Python projects that depend on it. It is crucial to take immediate action by removing the package and replacing it with a trusted alternative. Regularly monitoring and updating your project's dependencies is essential to ensure the security and integrity of your software. For further support and guidance on vulnerability remediation, contact DevNack.com.

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FAQ

You can use the Vulert playground at Vulert Scanner to check if your application is affected by this specific vulnerability. Simply provide your Pipfile.lock file, and Vulert will analyze it for any open-source vulnerabilities, including the malicious code in ultratool.

The consequences of this vulnerability can be severe. Attackers can gain unauthorized access to sensitive information, compromise user accounts, and execute arbitrary code on the affected system. This can lead to data breaches, financial loss, and reputational damage.

No, there is no fix available for the compromised version of ultratool. The best course of action is to remove the package from your project and find a trusted alternative.

To ensure the security of your Python projects, it is crucial to regularly update and audit your dependencies. Use tools like Vulert to monitor for vulnerabilities in your software. Additionally, follow best practices for secure coding, such as input validation, proper authentication, and secure storage of sensitive data.

For further support on vulnerability remediation, you can reach out to info@devnack.com. They can provide guidance and assistance in securing your projects and mitigating the risks associated with this vulnerability.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

pip uninstall ultratool

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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