CVE-2021-23426: Prototype Pollution in Proto
Summary
CVE-2021-23426: Prototype Pollution in Proto. Affects Proto versions < 1.1.4. No fix is published. How to fix ↓
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Background
Proto is an npm package that is susceptible to a prototype pollution vulnerability. This package provides a merge function that allows objects to be merged together. However, due to a flaw in the implementation, an attacker can exploit this merge function to inject malicious properties into an application's object. This vulnerability affects all versions of the Proto package.
Vulnerability Detail
The vulnerability arises from the merge function in Proto, which can be abused to pollute the object property of an application. By crafting specific input, an attacker can manipulate the merge function to introduce harmful properties into the object, leading to potential security issues. The impact of this vulnerability can range from unauthorized access to sensitive data to remote code execution. The Common Vulnerabilities and Exposures (CVE) identifier for this vulnerability is CVE-2021-23426. The vulnerability has a CVSS score of 7.5, indicating a high severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, if updating the Proto package is not immediately feasible, developers can manually validate and sanitize the input before using the merge function. By implementing proper input validation and ensuring that only trusted properties are merged, the risk of prototype pollution can be reduced. Here is an example of how to sanitize the input:
const proto = require('Proto');
function sanitizeInput(input) {
// Validate and sanitize the input object
// Only merge trusted properties
// Return the sanitized input
}
const sanitizedInput = sanitizeInput(input);
const mergedObject = proto.merge(sanitizedInput);
Conclusion
In conclusion, the Proto package is vulnerable to a prototype pollution issue that can be exploited to inject malicious properties into an application's object. To mitigate this vulnerability, it is crucial to update the Proto package to version 1.1.5 or later. Additionally, developers can implement input validation and sanitization as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Proto →
FAQ
Proto is an npm package that provides a merge function for merging objects together.
Prototype pollution is a vulnerability that occurs when an attacker can inject properties into an object's prototype, leading to unexpected behavior and potential security issues.
This vulnerability allows an attacker to inject malicious properties into an application's object, which can lead to unauthorized access, data manipulation, or even remote code execution.
Yes, updating the Proto package to version 1.1.5 or later will fix this vulnerability. The latest release includes proper input validation and sanitization to prevent prototype pollution attacks.
As a temporary workaround, developers can manually validate and sanitize the input before using the merge function. By implementing proper input validation and merging only trusted properties, the risk of prototype pollution can be reduced.
