Expect version 23.6.0 represents an incremental update following version 23.5.0 of this crucial assertion library used extensively within the Jest testing framework. While both versions maintain identical descriptions, pointing developers to Jest's official documentation for comprehensive usage details, notable differences appear in their dependencies and distribution.
Specifically, jest-diff and jest-matcher-utils dependencies were bumped from version 23.5.0 to 23.6.0. Since it's a semver compatible upgrade, that means that it includes bug fixes and small features. These updates potentially include enhancements in how differences between expected and actual values are displayed during test failures and improvements to the utility functions that power Expect's matchers.
Furthermore, the dist object reveals a slight increase in unpackedSize from 574,584 bytes in 23.5.0 to 576,227 bytes in 23.6.0, hinting at code additions or modifications within the package itself. The newer version was released about a month later, on September 10, 2018, compared to August 10, 2018, for version 23.5.0. This suggests that version 23.6.0 incorporates a month's worth of bug fixes, performance improvements, or new features integrated into its dependent packages. Developers should consider upgrading to leverage these enhancements for improved test reliability and clarity, especially regarding diff outputs.
All the vulnerabilities related to the version 23.6.0 of the package
Regular Expression Denial of Service (ReDoS) in micromatch
The NPM package micromatch prior to version 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in micromatch.braces() in index.js because the pattern .* will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persisted prior to https://github.com/micromatch/micromatch/pull/266. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching.
Regular Expression Denial of Service (ReDoS) in braces
A vulnerability was found in Braces versions prior to 2.3.1. Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) attacks.
Regular Expression Denial of Service in braces
Versions of braces prior to 2.3.1 are vulnerable to Regular Expression Denial of Service (ReDoS). Untrusted input may cause catastrophic backtracking while matching regular expressions. This can cause the application to be unresponsive leading to Denial of Service.
Upgrade to version 2.3.1 or higher.
Uncontrolled resource consumption in braces
The NPM package braces fails to limit the number of characters it can handle, which could lead to Memory Exhaustion. In lib/parse.js, if a malicious user sends "imbalanced braces" as input, the parsing will enter a loop, which will cause the program to start allocating heap memory without freeing it at any moment of the loop. Eventually, the JavaScript heap limit is reached, and the program will crash.
