java代码审计--xxe
2021/9/15 17:04:52
本文主要是介绍java代码审计--xxe,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
常见关键字
Documentbuilder DocumentBuilderFactory SAXReader SAXParser SAXParserFactory SAXBuilder TransformerFactory reqXml getInputStream XMLReaderFactory .newInstance SchemaFactory SAXTransformerFactory javax.xml.bind XMLReader XmlUtils.get Validator
java解析xml的方法有多种,比较常见的有四种:DOM、DOM4J、JDOM 和SAX。
//1. DocumentBuilder 原生、可回显 import javax.xml.parsers.DocumentBuilderFactory; DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); StringReader sr = new StringReader(xml_con); InputSource is = new InputSource(sr); Document document = db.parse(is); //2. saxReader 第三方库 import org.dom4j.io.SAXReader; SAXReader saxReader = new SAXReader(); Document document = saxReader.read(request.getInputStream()); //3. SAXBuilder 第三方库 import org.jdom2.input.SAXBuilder; SAXBuilder builder = new SAXBuilder(); Document document = builder.build(request.getInputStream()); //4. SAXParserFactory 原生、不可回显 import javax.xml.parsers.SAXParserFactory; SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxparser = factory.newSAXParser(); SAXHandler handler = new SAXHandler(); saxparser.parse(request.getInputStream(), handler);
防御方法:
//实例化解析类之后通常会支持着三个配置 obj.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); obj.setFeature("http://xml.org/sax/features/external-general-entities", false); obj.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
这篇关于java代码审计--xxe的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-05-15鸿蒙生态设备数量超8亿台
- 2024-05-13TiDB + ES:转转业财系统亿级数据存储优化实践
- 2024-05-09“2024鸿蒙零基础快速实战-仿抖音App开发(ArkTS版)”实战课程已上线
- 2024-05-09聊聊如何通过arthas-tunnel-server来远程管理所有需要arthas监控的应用
- 2024-05-09log4j2这么配就对了
- 2024-05-09nginx修改Content-Type
- 2024-05-09Redis多数据源,看这篇就够了
- 2024-05-09Google Chrome驱动程序 124.0.6367.62(正式版本)去哪下载?
- 2024-05-09有没有大佬知道这种数据应该怎么抓取呀?
- 2024-05-09这种运行结果里的10.100000001,怎么能最快改成10.1?