CVE-2021-23432: Prototype Pollution in mootools
Summary
CVE-2021-23432: Prototype Pollution in mootools. Affects mootools versions < 1.5.2. No fix is published. How to fix ↓
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Background
Mootools is an open-source JavaScript framework that provides a set of utilities for building interactive web applications. It offers a range of features such as DOM manipulation, event handling, and AJAX functionality. The package is widely used in web development projects and has versions available for the npm ecosystem. However, all versions of the mootools package are vulnerable to prototype pollution due to the ability to pass untrusted input to the Object.merge() function.
Vulnerability Detail
The vulnerability in mootools arises from the Object.merge() function's lack of input validation, allowing untrusted input to modify the prototype of objects. This can lead to prototype pollution, where an attacker can inject or modify properties on Object.prototype, potentially leading to various security issues. The impact of this vulnerability can range from data integrity and confidentiality breaches to remote code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, developers can implement input validation and sanitization before passing data to the Object.merge() function. By ensuring that only trusted input is processed, the risk of prototype pollution can be mitigated. Here's an example of how input validation can be implemented in JavaScript:
function mergeObjects(target, source) {
if (typeof target !== 'object' || typeof source !== 'object') {
throw new Error('Invalid input');
}
return Object.assign(target, source);
}
Conclusion
In conclusion, the mootools package is vulnerable to prototype pollution due to the lack of input validation in the Object.merge() function. This can have serious security implications, including data integrity and confidentiality breaches. It is crucial for developers to update to a secure version of the package that includes a fix for this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Prototype pollution is a vulnerability that occurs when untrusted data is able to modify the prototype of objects. This can lead to unexpected behavior and security issues.
Object.merge() is a function in mootools that allows merging properties from multiple objects into a single object. However, it is vulnerable to prototype pollution when untrusted input is passed to it.
The consequences of this vulnerability can include data integrity and confidentiality breaches, remote code execution, and unexpected behavior in the application.
Yes, all versions of the mootools package are affected by this vulnerability. Developers should update to a secure version that includes a fix for the prototype pollution issue.
To update the mootools package, you can use the package manager command 'npm update mootools'. Make sure to review the release notes and changelog to identify the fixed version.
References
Related vulnerabilities
Recent vulnerabilities recorded for mootools.
