Lodash-es offers the popular Lodash utility library in a modular format, specifically designed for use with modern JavaScript environments that leverage ES modules. Comparing versions 4.17.9 and 4.17.8 reveals subtle but potentially impactful differences for developers. Both versions maintain the same core functionality, providing a comprehensive suite of tools for array manipulation, object handling, string processing, and more. They are both distributed under the MIT license, encouraging open use and modification. The code is hosted on GitHub.
However, the key distinction lies in the details of each release. Version 4.17.9, released on April 24, 2018, shows a negligibly larger unpacked size (628247 bytes) compared to version 4.17.8 (628017 bytes) released on March 27, 2018. This suggests that 4.17.9 includes minor bug fixes, performance improvements, or perhaps subtle code enhancements that don't fundamentally alter the API. While the file count remains the same at 645, the slight size increase indicates internal changes.
For developers, the choice between these versions depends on their project's specific needs. If stability and well-tested code are paramount, sticking with 4.17.8 might seem prudent. However, adopting 4.17.9 ensures access to the latest refinements, potentially mitigating edge-case bugs or benefiting from slight performance boosts. Checking the changelog or release notes (usually available on the Lodash GitHub repository) would give more detailed information about what changed internally. Ultimately, Lodash-es allows developers to selectively import only the functions they need, leading to smaller bundle sizes and potentially faster load times compared to using the full Lodash library.
All the vulnerabilities related to the version 4.17.9 of the package
Regular Expression Denial of Service (ReDoS) in lodash
lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled Resource Consumption. The impact is: Denial of service. The component is: Date handler. The attack vector is: Attacker provides very long strings, which the library attempts to match using a regular expression. The fixed version is: 4.7.11.
Prototype Pollution in lodash
Versions of lodash before 4.17.12 are vulnerable to Prototype Pollution. The function defaultsDeep allows a malicious user to modify the prototype of Object via {constructor: {prototype: {...}}} causing the addition or modification of an existing property that will exist on all objects.
Update to version 4.17.12 or later.
Prototype Pollution in lodash
Versions of lodash prior to 4.17.19 are vulnerable to Prototype Pollution. The functions pick, set, setWith, update, updateWith, and zipObjectDeep allow a malicious user to modify the prototype of Object if the property identifiers are user-supplied. Being affected by this issue requires manipulating objects based on user-provided property values or arrays.
This vulnerability causes the addition or modification of an existing property that will exist on all objects and may lead to Denial of Service or Code Execution under specific circumstances.
Regular Expression Denial of Service (ReDoS) in lodash
All versions of package lodash prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the toNumber, trim and trimEnd functions.
Steps to reproduce (provided by reporter Liyuan Chen):
var lo = require('lodash');
function build_blank(n) {
var ret = "1"
for (var i = 0; i < n; i++) {
ret += " "
}
return ret + "1";
}
var s = build_blank(50000) var time0 = Date.now();
lo.trim(s)
var time_cost0 = Date.now() - time0;
console.log("time_cost0: " + time_cost0);
var time1 = Date.now();
lo.toNumber(s) var time_cost1 = Date.now() - time1;
console.log("time_cost1: " + time_cost1);
var time2 = Date.now();
lo.trimEnd(s);
var time_cost2 = Date.now() - time2;
console.log("time_cost2: " + time_cost2);
Command Injection in lodash
lodash versions prior to 4.17.21 are vulnerable to Command Injection via the template function.