CVE-2018-16489: Prototype Pollution in just-extend
Summary
CVE-2018-16489: Prototype Pollution in just-extend. Affects just-extend versions < 4.0.0. Fixed in 4.0.0. How to fix ↓
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Background
The just-extend package is an npm package that provides a set of utility functions for extending objects in JavaScript. It allows developers to add or modify properties of objects easily. However, versions of just-extend before 4.0.0 are vulnerable to prototype pollution. This means that certain input can lead to the addition or modification of properties on the Object prototype, affecting all objects in the application.
Vulnerability Detail
The vulnerability in just-extend arises from improper handling of user input, which can be manipulated to modify the Object prototype. This can have various consequences, such as altering the behavior of built-in JavaScript functions or introducing unexpected behavior in the application. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or cause denial of service.
How To Fix
Minimum fixed version
4.0.0
This is the first release that contains the fix.
npm install just-extend@4.0.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to update to the fixed version of the package to mitigate the risk.
Conclusion
The just-extend package before version 4.0.0 is vulnerable to prototype pollution, which can have severe security implications. It is crucial to update to version 4.0.0 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for just-extend →
FAQ
Prototype pollution is a vulnerability that occurs when user-controllable input is not properly sanitized or validated, allowing the modification of object prototypes. This can lead to unexpected behavior and potential security risks.
An attacker can exploit this vulnerability by providing specially crafted input that manipulates the just-extend package's functionality to modify the Object prototype. This can lead to various security issues, such as code execution or privilege escalation.
No, only versions before 4.0.0 are vulnerable to prototype pollution. It is crucial to update to version 4.0.0 or later to address this vulnerability.
Yes, updating to version 4.0.0 or later of the just-extend package fixes the prototype pollution vulnerability. It is recommended to update as soon as possible.
No, there is no known workaround for this vulnerability. Updating to the fixed version is the only solution.
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