Prototype Pollution in lutils-merge

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Background

lutils-merge is an npm package that provides a merge() function for merging objects. It is used to combine properties from multiple objects into a single object. The package is vulnerable to Prototype Pollution, a type of vulnerability where user input can modify an object's prototype, leading to potential security issues. This vulnerability affects all versions of lutils-merge.

Vulnerability Detail

The merge() function in lutils-merge does not properly validate user input, allowing attackers to alter an object's prototype. By manipulating the prototype, an attacker can override properties of all objects in the application. This can lead to various security risks, including Denial of Service attacks or even Remote Code Execution if combined with other vulnerabilities.

Workaround

As there is no fix available for lutils-merge, the best workaround is to find a suitable alternative package that provides similar functionality but is not vulnerable to Prototype Pollution. Here is an example of how to use the lodash.merge package as an alternative:

const merge = require('lodash.merge');

const obj1 = { a: 1 };
const obj2 = { b: 2 };

const merged = merge(obj1, obj2);
console.log(merged); // { a: 1, b: 2 }

Conclusion

lutils-merge is a deprecated npm package that is vulnerable to Prototype Pollution. This vulnerability allows attackers to modify an object's prototype, leading to potential security risks. As there is no fix available, it is recommended to use an alternative package, such as lodash.merge, that does not have this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for lutils-merge →

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