CVE-2021-23396: Prototype Pollution in lutils
Summary
CVE-2021-23396: Prototype Pollution in lutils. Affects lutils versions < 2.4.0. No fix is published. How to fix ↓
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Background
lutils is an npm package that provides utility functions for JavaScript applications. It is susceptible to a vulnerability known as Prototype Pollution, which affects the main (merge) function in all versions of the package.
Vulnerability Detail
Prototype Pollution is a vulnerability that allows an attacker to modify the prototype of an object, leading to unexpected behavior and potential security issues. In the case of lutils, this vulnerability can be exploited through the main function, enabling an attacker to pollute the prototype chain and potentially execute arbitrary code or modify existing objects.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, developers can avoid using the main function in lutils or implement input validation and sanitization to prevent malicious payloads from polluting the prototype chain. Here is an example of input validation for the merge function:
function merge(obj1, obj2) {
if (typeof obj1 !== 'object' || typeof obj2 !== 'object') {
throw new Error('Invalid input');
}
// Merge logic
}
Conclusion
lutils is vulnerable to Prototype Pollution via the main (merge) function. To fix this issue, it is crucial to update lutils to a version that is not affected by the vulnerability. Implementing input validation and sanitization can serve as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for lutils →
FAQ
Prototype Pollution is a vulnerability that allows an attacker to modify the prototype of an object, leading to unexpected behavior and potential security issues.
The Prototype Pollution vulnerability affects the main (merge) function in all versions of lutils, allowing an attacker to pollute the prototype chain and potentially execute arbitrary code or modify existing objects.
The impact of this vulnerability depends on how lutils is used within an application. If the main function is used with untrusted input, an attacker could manipulate the prototype chain and potentially execute malicious code or modify critical objects.
Yes, all versions of lutils up to and including 2.4.0 are affected by the Prototype Pollution vulnerability.
To mitigate the risk of this vulnerability, it is recommended to update lutils to a version beyond 2.4.0, as the vulnerability was introduced in version 0 and affects all versions up to 2.4.0.
