ESLint version 0.4.4 represents an incremental update over its predecessor, version 0.4.3, focusing primarily on dependency enhancements and refinements rather than introducing groundbreaking new features. Both versions share the same core functionality as an Esprima-based pattern checker for JavaScript, aimed at helping developers enforce consistent coding styles and identify potential errors. Key dependencies like glob, chalk, escope, esprima, js-yaml, estraverse, optionator, text-table, and strip-json-comments remain consistent between the two versions, ensuring stability in core linting operations.
The most notable difference lies in the doctrine dependency, which advances from version 0.3.0 in 0.4.3 to ~0.5.0 in 0.4.4. This update likely incorporates bug fixes, performance improvements, or enhanced support for JSDoc parsing within the doctrine library itself, thus indirectly benefiting ESLint's ability to accurately interpret and validate code comments. Another relevant difference is the addition of "shelljs-nodecli":"~0.1.0" to the devDependencies for v0.4.4 which enables some shell commands to be run in node.
For developers, upgrading to version 0.4.4 mainly assures access to the benefits derived from the newer doctrine version. While the core linting experience remains largely unchanged, developers working with complex JavaScript codebases that heavily rely on JSDoc annotations could find improved accuracy and reliability in ESLint's analysis. As with any dependency update, it's prudent to conduct thorough testing to ensure compatibility and prevent unforeseen issues. The upgrade is probably non-breaking and worthwhile.
All the vulnerabilities related to the version 0.4.4 of the package
Regular Expression Denial of Service in minimatch
Affected versions of minimatch are vulnerable to regular expression denial of service attacks when user input is passed into the pattern argument of minimatch(path, pattern).
var minimatch = require(“minimatch”);
// utility function for generating long strings
var genstr = function (len, chr) {
var result = “”;
for (i=0; i<=len; i++) {
result = result + chr;
}
return result;
}
var exploit = “[!” + genstr(1000000, “\\”) + “A”;
// minimatch exploit.
console.log(“starting minimatch”);
minimatch(“foo”, exploit);
console.log(“finishing minimatch”);
Update to version 3.0.2 or later.
minimatch ReDoS vulnerability
A vulnerability was found in the minimatch package. This flaw allows a Regular Expression Denial of Service (ReDoS) when calling the braceExpand function with specific arguments, resulting in a Denial of Service.
Denial of Service in js-yaml
Versions of js-yaml prior to 3.13.0 are vulnerable to Denial of Service. By parsing a carefully-crafted YAML file, the node process stalls and may exhaust system resources leading to a Denial of Service.
Upgrade to version 3.13.0.
Code Injection in js-yaml
Versions of js-yaml prior to 3.13.1 are vulnerable to Code Injection. The load() function may execute arbitrary code injected through a malicious YAML file. Objects that have toString as key, JavaScript code as value and are used as explicit mapping keys allow attackers to execute the supplied code through the load() function. The safeLoad() function is unaffected.
An example payload is
{ toString: !<tag:yaml.org,2002:js/function> 'function (){return Date.now()}' } : 1
which returns the object
{
"1553107949161": 1
}
Upgrade to version 3.13.1.
Arbitrary Code Execution in underscore
The package underscore from 1.13.0-0 and before 1.13.0-2, from 1.3.2 and before 1.12.1 are vulnerable to Arbitrary Code Execution via the template function, particularly when a variable property is passed as an argument as it is not sanitized.
Regular Expression Denial of Service in underscore.string
Versions of underscore.string prior to 3.3.5 are vulnerable to Regular Expression Denial of Service (ReDoS).
The function unescapeHTML is vulnerable to ReDoS due to an overly-broad regex. The slowdown is approximately 2s for 50,000 characters but grows exponentially with larger inputs.
Upgrade to version 3.3.5 or higher.