rConfig <3.9.4 - Sensitive Information Disclosure

highseverity

7.5CVSS score

18.1%likelihood of exploitation, next 30 days

97%of all CVEs are less likely

Readycheck to confirm it

rConfig prior to version 3.9.4 is susceptible to sensitive information disclosure. An unauthenticated attacker can retrieve saved cleartext credentials via a GET request to settings.php. Because the application does not exit after a redirect is applied, the rest of the page still executes, resulting in the disclosure of cleartext credentials in the response.

Impact

An attacker can exploit this vulnerability to gain access to sensitive information, such as usernames and passwords.

Fix

Upgrade rConfig to version 3.9.4 or later to fix the vulnerability.

How to confirm it

Send: GET {{BaseURL}}/settings.php
Positive when: contains "defaultNodeUsername" and "defaultNodePassword" AND status 200

Run it with nuclei: nuclei -id CVE-2020-9425 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-9425

info:
  name: rConfig <3.9.4 - Sensitive Information Disclosure
  author: madrobot
  severity: high
  description: rConfig prior to version 3.9.4 is susceptible to sensitive information disclosure. An unauthenticated attacker can retrieve saved cleartext credentials via a GET request to settings.php. Because the application does not exit after a redirect is applied, the rest of the page still executes, resulting in the disclosure of cleartext credentials in the response.
  impact: |
    An attacker can exploit this vulnerability to gain access to sensitive information, such as usernames and passwords.
  remediation: |
    Upgrade rConfig to version 3.9.4 or later to fix the vulnerability.
  reference:
    - https://blog.hivint.com/rconfig-3-9-3-unauthenticated-sensitive-information-disclosure-ead4ed88f153
    - https://github.com/rconfig/rconfig/commit/20f4e3d87e84663d922b937842fddd9af1b68dd9
    - https://nvd.nist.gov/vuln/detail/CVE-2020-9425
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2020-9425
    cwe-id: CWE-670
    epss-score: 0.1808
    epss-percentile: 0.97221
    cpe: cpe:2.3:a:rconfig:rconfig:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: rconfig
    product: rconfig
    shodan-query: http.title:"rconfig"
    fofa-query: title="rconfig"
    google-query: intitle:"rconfig"
  tags: cve,cve2020,rconfig.exposure,rconfig,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/settings.php"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "defaultNodeUsername"
          - "defaultNodePassword"
        condition: and

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from