io.codemodder.codemods.harden-xmlreader.yaml Maven / Gradle / Ivy

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Codemods for fixing common errors across many Java projects

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rules:
  - id: harden-xmlreader
    patterns:
      - pattern: $XMLR.parse(...);
      - pattern-inside: |
          $RT $METHOD ($ARGS) {
            ...
            $XMLR = XMLReaderFactory.createXMLReader(...);
            ...
          }
      - pattern-not-inside: |
          $RT $METHOD ($ARGS) {
            ...
            $XMLR.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
            ...
          }
      - pattern-not-inside: |
          $RT $METHOD ($ARGS) {
            ...
            $XMLR.setFeature("http://xml.org/sax/features/external-general-entities", false);
            ...
            $XMLR.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            ...
          }
      - pattern-not-inside: |
          $RT $METHOD ($ARGS) {
            ...
            $XMLR.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            ...
            $XMLR.setFeature("http://xml.org/sax/features/external-general-entities", false);
            ...
          }
      - focus-metavariable: $XMLR
    message: "Semgrep found a match"
    languages:
      - java
    severity: WARNING