xxe漏洞是如何修复的

使用java对xxe漏洞进行修复的方法

xxe漏洞代码：

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
String FEATURE = null;
// dbf.setExpandEntityReferences无法防止xxe
dbf.setExpandEntityReferences(false);
DocumentBuilder documentBuilder = dbf.newDocumentBuilder();
Document document = documentBuilder.parse(new File("poc.xml"));

xxe漏洞修复代码：

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
String FEATURE = null;
FEATURE = "http://apache.org/xml/features/disallow-doctype-decl";
dbf.setFeature(FEATURE, true);
FEATURE = "http://xml.org/sax/features/external-general-entities";
dbf.setFeature(FEATURE, false);
FEATURE = "http://xml.org/sax/features/external-parameter-entities";
dbf.setFeature(FEATURE, false);
FEATURE = "http://apache.org/xml/features/nonvalidating/load-external-dtd";
dbf.setFeature(FEATURE, false);
dbf.setXIncludeAware(false);
// dbf.setExpandEntityReferences无法防止xxe
dbf.setExpandEntityReferences(false);
DocumentBuilder documentBuilder = dbf.newDocumentBuilder();

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