CVE-2023-43646: Get func name Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-4q6p-r6v2-jvc5
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CVSS 7.5
CWE-400 CWE-1333
Published
Advisory Summary

CVE-2023-43646 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Get func name libraries in the npm ecosystem. The issue involves chaijs/get-func-name vulnerable to redos. Remediation is available by upgrading affected packages to version 2.0.1.

CVE-2023-43646 at a Glance

CVE Identifier CVE-2023-43646
GHSA Identifier GHSA-4q6p-r6v2-jvc5
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Get func name
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-43646

To remediate this vulnerability, upgrade all affected Get func name dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

get-func-name fixed: 2.0.1 
npm install get-func-name@2.0.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls get-func-name

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-43646, inspect your project dependencies using npm:

npm ls get-func-name

Analyze the terminal output to locate any version of Get func name in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.1), your application is affected.

Note: The npm ls get-func-name command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Get func name, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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"); ```

CVE-2023-43646 Affected Get func name Versions

1 component(s)
Fixed Versions:
2.0.1
Product / Package Ecosystem Affected Versions Fixed Version
get-func-name
npm/get-func-name
npm
< 2.0.1
2.0.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/chaijs/get-func-name/security/advisories/GHSA-4q6p-r6v2-jvc5
NVD — CVE-2023-43646 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-43646
Security Fix Commit FIX COMMIT
https://github.com/chaijs/get-func-name/commit/f934b228b5e2cb94d6c8576d3aac05493f667c69
Get func name Source Repository REPOSITORY
https://github.com/chaijs/get-func-name
Get func name Source Repository REPOSITORY
https://github.com/chaijs/get-func-name/blob/78ad756441a83f3dc203e50f76c113ae3ac017dc/index.js#L15

Frequently Asked Questions

What is CVE-2023-43646?
CVE-2023-43646 is a security vulnerability in Get func name involving Chaijs/get-func-name vulnerable to ReDoS under CWE-400: Uncontrolled Resource Consumption.
Which Get func name versions are affected?
Affected versions include releases prior to 2.0.1 across affected packages: get-func-name.
What version fixes CVE-2023-43646?
Upgrading to 2.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is get-func-name affected?
Yes, get-func-name is affected in releases prior to 2.0.1. Upgrade your dependency to 2.0.1 or later.
What is the CVSS score of CVE-2023-43646?
CVE-2023-43646 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2023-43646?
CVE-2023-43646 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2023-43646?
Run the dependency tree command: 'npm ls get-func-name'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4q6p-r6v2-jvc5",
  "modified" : "2023-10-02T21:05:48Z",
  "published" : "2023-09-27T20:16:00Z",
  "aliases" : [ "CVE-2023-43646" ],
  "summary" : "Chaijs/get-func-name vulnerable to ReDoS",
  "details" : "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:\n\n```js\nconst functionNameMatch = /\\s*function(?:\\s|\\s*\\/\\*[^(?:*/)]+\\*\\/\\s*)*([^\\s(/]+)/;\n```\n\nThis 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:\n\n```js\n'\\t'.repeat(54773) + '\\t/function/i'\n```\n\nHere is a simple PoC code to demonstrate the issue:\n\n```js\nconst protocolre = /\\sfunction(?:\\s|\\s/*[^(?:*\\/)]+*/\\s*)*([^\\(\\/]+)/;\n\nconst startTime = Date.now();\nconst maliciousInput = '\\t'.repeat(54773) + '\\t/function/i'\n\nprotocolre.test(maliciousInput);\n\nconst endTime = Date.now();\n\nconsole.log(\"process time: \", endTime - startTime, \"ms\");\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "get-func-name"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/chaijs/get-func-name/security/advisories/GHSA-4q6p-r6v2-jvc5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-43646"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chaijs/get-func-name/commit/f934b228b5e2cb94d6c8576d3aac05493f667c69"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chaijs/get-func-name"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chaijs/get-func-name/blob/78ad756441a83f3dc203e50f76c113ae3ac017dc/index.js#L15"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333", "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-27T20:16:00Z",
    "nvd_published_at" : "2023-09-27T15:19:34Z"
  }
}