Sass version 1.10.3 is a minor update to the widely used Dart Sass library, a pure JavaScript implementation of the popular CSS preprocessor. Building upon version 1.10.2, the core functionality remains consistent, offering developers a reliable tool for writing maintainable and efficient CSS. Both versions share the same core dependencies, including chokidar for file system watching, crucial for automatic Sass compilation during development.
The key difference lies in the release date, with version 1.10.3 being published on August 3, 2018, shortly after version 1.10.2 on August 2, 2018. While the unpacked and packed size remains the same in both versions, this suggests bug fixes and minor changes. For developers, this incremental update indicates a stable and actively maintained library. If you're already using version 1.10.2, upgrading to 1.10.3 is recommended to benefit from the latest improvements and optimizations, which contribute to a smoother development workflow. The download size being the same, it is safe to assume that upgrading won't impact your performance.
All the vulnerabilities related to the version 1.10.3 of the package
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.
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.
