ESLint version 0.6.0 represents an incremental update to version 0.5.1 of this popular JavaScript linting tool. Both versions share the same core functionality, providing developers with an Esprima-based pattern checker for ensuring code quality and stylistic consistency. They utilize a similar set of dependencies for core operations, including glob for file system traversal, chalk for colored console output, escope for ECMAScript scope analysis, js-yaml for YAML parsing, doctrine for JSDoc parsing, estraverse for AST traversal, optionator for option parsing, text-table for tabular output, cssauron-esprima for CSS selector based AST querying and strip-json-comments for removing comments from JSON files. The development dependencies also remained consistent between the two versions, featuring tools for testing, browser compatibility, and code coverage.
The primary change from a developer's perspective lies within the esprima dependency. Version 0.6.0 upgrades to esprima version ^1.2.0 while the previous version used esprima version ~1.1.1. This implies that version 0.6.0 includes any bug fixes, performance improvements, and new ECMAScript syntax support introduced in Esprima 1.2.0 and later. Upgrading esprima would allow ESLint to better analyze modern JavaScript code and potentially catch new types of errors or offer improved suggestions. Developers who want to benefit from these updates and use ESLint with the latest JavaScript features should upgrade to version 0.6.0.
All the vulnerabilities related to the version 0.6.0 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.