Sass version 1.15.3 is a minor update to the Dart Sass implementation, building upon the foundation laid by version 1.15.2. Both versions provide a pure JavaScript solution for compiling Sass stylesheets, making them compatible with a wide range of JavaScript-based development environments. Key features like cross-platform compatibility and ease of integration remain central to these releases.
While the core functionality remains consistent, there are subtle differences that developers should note. Version 1.15.3, released on January 4, 2019, features a slightly smaller unpacked size (672193 bytes) compared to version 1.15.2 (696427 bytes) released on December 6, 2018. This optimization, while potentially minor, could indicate improvements in code efficiency or a reduction in resource footprint. Both versions share the same dependency on chokidar for file watching, signifying that the file watching capabilities remain consistent between the two releases.
For developers considering an upgrade, the move from 1.15.2 to 1.15.3 should be seamless. The smaller size is a plus. As with any dependency update, it's advisable to run tests to ensure compatibility with your specific project configuration and to confirm that any previously identified issues have been addressed. The official repository remains at GitHub, providing a central hub for reporting and contributing the package.
All the vulnerabilities related to the version 1.15.3 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.
