XML parsing vulnerable to XEE

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Metadata

ID: java-security/xml-parsing-xee

Language: Java

Severity: Notice

Category: Security

CWE: 611

Description

Systems may be vulnerable to an XML External Entity attack when they process XML from untrusted sources.

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Non-Compliant Code Examples

public class TestClass {

    public void parseXML(InputStream input) throws XMLStreamException {

        XMLInputFactory factory = XMLInputFactory.newFactory();
        factory.setProperty("aproperty", false);
        XMLStreamReader reader = factory.createXMLStreamReader(input);
        factory.setProperty("anotherproperty", false);
    }
}

Compliant Code Examples

public class TestClass {

    public void parseXML(InputStream input) throws XMLStreamException {

        XMLInputFactory factory = XMLInputFactory.newFactory();
        factory.setProperty("aproperty", false);
        factory.setProperty(XMLInputFactory.SUPPORT_DTD, false);
        factory.setProperty("anotherproperty", false);
        XMLStreamReader reader = factory.createXMLStreamReader(input);
    }
}

public class TestClass {

    public void parseXML(InputStream input) throws XMLStreamException {

        XMLInputFactory factory = XMLInputFactory.newFactory();
        factory.setProperty("aproperty", false);
        factory.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, false);
        factory.setProperty("anotherproperty", false);
        XMLStreamReader reader = factory.createXMLStreamReader(input);
    }
}