CVE-2022-25904: Prototype Pollution in safe-eval
Summary
CVE-2022-25904: safe-eval vulnerable to Prototype Pollution. Affects safe-eval versions < 0.4.1. No fix is published. How to fix ↓
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Background
The safe-eval package is an npm package that provides a function called safeEval, which allows users to evaluate JavaScript code in a safe manner. It is commonly used in applications that require dynamic code execution, such as sandboxed environments or code editors. However, all versions of safe-eval are vulnerable to Prototype Pollution, a type of vulnerability that allows an attacker to modify or add properties to the Object.prototype.Consolidate object. This vulnerability is due to the usage of the vm variable in the safeEval function, which can be exploited by an attacker to manipulate the Object.prototype.
Vulnerability Detail
The Prototype Pollution vulnerability in safe-eval can have severe consequences. By modifying the Object.prototype.Consolidate object, an attacker can potentially alter the behavior of the entire JavaScript application. This can lead to various security issues, such as remote code execution, information disclosure, or privilege escalation. The vulnerability can be triggered by passing malicious input to the safeEval function, allowing the attacker to execute arbitrary code within the application's context.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If upgrading the safe-eval package is not immediately feasible, a possible workaround is to implement input validation and sanitization before passing the input to the safeEval function. By carefully validating and sanitizing the input, the risk of exploitation can be mitigated. Here is an example of how input validation can be implemented in JavaScript:
function safeEvalWrapper(input) {
// Perform input validation and sanitization here
if (typeof input !== 'string') {
throw new Error('Invalid input');
}
// Call the safeEval function with the sanitized input
return safeEval(input);
}
Conclusion
The Prototype Pollution vulnerability in the safe-eval package can have serious security implications. It is crucial to update to a non-vulnerable version of the package or consider using alternative packages. Implementing input validation and sanitization can provide a temporary workaround until the package can be updated. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for safe-eval →
FAQ
Prototype Pollution is a vulnerability that occurs when an attacker is able to modify the prototype of an object, allowing them to add or modify properties that affect all instances of that object. This can lead to unexpected behavior and security issues.
The safe-eval package can be exploited by passing malicious input to the safeEval function. This input can contain JavaScript code that manipulates the Object.prototype.Consolidate object, leading to potential security vulnerabilities.
The consequences of this vulnerability can vary depending on how it is exploited. Possible consequences include remote code execution, information disclosure, and privilege escalation. It is important to address this vulnerability to prevent these potential security issues.
Yes, a fix for this vulnerability has been released in version 0.4.2 of the safe-eval package. It is recommended to update to this version or any subsequent version to mitigate the risk of exploitation.
If upgrading the safe-eval package is not immediately feasible, a possible workaround is to implement input validation and sanitization before passing the input to the safeEval function. This can help mitigate the risk of exploitation by ensuring that only safe input is processed.
References
Related vulnerabilities
Recent vulnerabilities recorded for safe-eval.
