ajinabraham.njsscan.server_side_template_injection.server_side_template_injection

rules:
  - id: server_side_template_injection
    patterns:
      - pattern-either:
          - pattern-inside: |
              require('handlebars')
              ...
          - pattern-inside: |
              require('pug')
              ...
          - pattern-inside: |
              require('hamljs')
              ...
          - pattern-inside: |
              require('ejs')
              ...
          - pattern-inside: |
              require('squirrelly')
              ...
          - pattern-inside: |
              require('eta')
              ...
      - pattern-either:
          - pattern-inside: function ($REQ, $RES, ...) {...}
          - pattern-inside: function $FUNC($REQ, $RES, ...) {...}
          - pattern-inside: $X = function $FUNC($REQ, $RES, ...) {...}
          - pattern-inside: var $X = function $FUNC($REQ, $RES, ...) {...};
          - pattern-inside: $APP.$METHOD(..., function $FUNC($REQ, $RES, ...) {...})
      - pattern-either:
          - pattern: |
              $HB.compile(..., <... $REQ.$FOO ...>, ...)
          - pattern: |
              $HB.compile(..., <... $REQ.$FOO.$BAR ...>, ...)
          - pattern: |
              $X = <... $REQ.$FOO ...>;
              ...
              $HB.compile(..., <... $X ...>, ...)
          - pattern: |
              $X = <... $REQ.$FOO.$BAR ...>;
              ...
              $HB.compile(..., <... $X ...>, ...)
          - pattern: |
              $X = $SOURCE.replace('...', <... $REQ.$FOO ...>, ...)
              ...
              $HB.compile(..., <... $X ...>, ...)
          - pattern: |
              $X = $SOURCE.replace('...', <... $REQ.$FOO.$BAR ...>, ...)
              ...
              $HB.compile(..., <... $X ...>, ...)
          - pattern: |
              $HB.Compile(..., <... $REQ.$FOO ...>, ...)
          - pattern: |
              $HB.Compile(..., <... $REQ.$FOO.$BAR ...>, ...)
          - pattern: |
              $X = <... $REQ.$FOO ...>;
              ...
              $HB.Compile(..., <... $X ...>, ...)
          - pattern: |
              $X = <... $REQ.$FOO.$BAR ...>;
              ...
              $HB.Compile(..., <... $X ...>, ...)
          - pattern: |
              $X = $SOURCE.replace('...', <... $REQ.$FOO ...>, ...)
              ...
              $HB.Compile(..., <... $X ...>, ...)
          - pattern: |
              $X = $SOURCE.replace('...', <... $REQ.$FOO.$BAR ...>, ...)
              ...
              $HB.Compile(..., <... $X ...>, ...)
    message: Untrusted user input in templating engine's compile() function can
      result in Remote Code Execution via server side template injection.
    languages:
      - javascript
    severity: ERROR
    metadata:
      owasp-web: a1
      cwe: cwe-94
      license: LGPL-3.0-or-later