zhaji2333
Registry indexed
deserialization-xxe
当发现XML导入/SOAP/Office解析、序列化数据（Java/PHP/Python/.NET）、JSON深合并、yaml.load、不可信反序列化入口时调用。负责反序列化RCE链、XXE、原型污染、phpggc/ysoserial利用链构造与验证。
Registry indexed
当发现XML导入/SOAP/Office解析、序列化数据（Java/PHP/Python/.NET）、JSON深合并、yaml.load、不可信反序列化入口时调用。负责反序列化RCE链、XXE、原型污染、phpggc/ysoserial利用链构造与验证。
当发现XML导入/SOAP/Office解析、序列化数据（Java/PHP/Python/.NET）、JSON深合并、yaml.load、不可信反序列化入口时调用。负责反序列化RCE链、XXE、原型污染、phpggc/ysoserial利用链构造与验证。
Source documentation, not instructions for this website. Review permissions before running any commands.
source-code-audit）| 类型 | 语言/场景 | 修复 |
|---|---|---|
| H1. 反序列化 | Java/PHP/Python/.NET | 禁用危险反序列化、白名单 |
| H2. XXE | XML导入、SOAP、Office解析 | 禁用外部实体 |
| H3. 原型污染 | Node.js对象合并 | 过滤危险键 |
Java: readObject / XMLDecoder / JNDI lookup / JdbcRowSetImpl / TemplatesImpl
PHP: unserialize / phar反序列化
Python: pickle.loads / yaml.load(Loader=Loader)
.NET: BinaryFormatter / XMLSerializer
| 语言 | 工具 |
|---|---|
| Java | ysoserial / marshalsec（RMI/LDAP 起服务） |
| PHP | phpggc |
| Python | pickle 手工构造 |
rO0AB（Java）、a:{}（PHP）、O:8:（PHP对象）<?xml version="1.0"?>
<!DOCTYPE foo [
<!ENTITY xxe SYSTEM "file:///etc/passwd">
]>
<foo>&xxe;</foo>
SYSTEM "http://169.254.169.254/latest/meta-data/"file:///etc/passwd、php://filter/read=convert.base64-encode/resource=config.php__proto__ / constructor.prototype / constructor.prototype.__proto__
__proto__.isAdmin=true / __proto__.shell=...__proto__.env（pug/ejs 模板引擎 RCE）Object.prototype 影响全局校验逻辑Object.prototype 被污染SafeLoader__proto__/constructor 键name: deserialization-xxe description: 当发现XML导入/SOAP/Office解析、序列化数据（Java/PHP/Python/.NET）、JSON深合并、yaml.load、不可信反序列化入口时调用。负责反序列化RCE链、XXE、原型污染、phpggc/ysoserial利用链构造与验证。
---
name: deserialization-xxe
description: 当发现XML导入/SOAP/Office解析、序列化数据（Java/PHP/Python/.NET）、JSON深合并、yaml.load、不可信反序列化入口时调用。负责反序列化RCE链、XXE、原型污染、phpggc/ysoserial利用链构造与验证。
---
# deserialization-xxe — 反序列化与解析器漏洞专项深度挖掘
## 何时调用（触发条件）
- XML 导入/上传、SOAP 接口、Office/Excel 解析
- 序列化数据入口（Java readObject、PHP unserialize、Python pickle、.NET BinaryFormatter）
- JSON 深合并/深拷贝（Node.js 原型污染）
- yaml.load 未指定安全 Loader
- 代码审计发现危险函数（见 `source-code-audit`）
## 一、漏洞类型全景
| 类型 | 语言/场景 | 修复 |
|---|---|---|
| H1. 反序列化 | Java/PHP/Python/.NET | 禁用危险反序列化、白名单 |
| H2. XXE | XML导入、SOAP、Office解析 | 禁用外部实体 |
| H3. 原型污染 | Node.js对象合并 | 过滤危险键 |
## 二、反序列化专项
### 各语言危险入口
```
Java: readObject / XMLDecoder / JNDI lookup / JdbcRowSetImpl / TemplatesImpl
PHP: unserialize / phar反序列化
Python: pickle.loads / yaml.load(Loader=Loader)
.NET: BinaryFormatter / XMLSerializer
```
### 利用工具
| 语言 | 工具 |
|---|---|
| Java | ysoserial / marshalsec（RMI/LDAP 起服务） |
| PHP | phpggc |
| Python | pickle 手工构造 |
### 利用链思路
- Java：Gadget 链（CommonsCollections、CommonsBeanutils 等）→ RMI/LDAP 打 JNDI
- PHP：POP 链（Laravel/ThinkPHP/Yii 框架 gadget）+ phar 协议触发
- Python：pickle 反序列化执行命令
- 入口识别：base64/hex 编码的序列化流、`rO0AB`（Java）、`a:{}`（PHP）、`O:8:`（PHP对象）
## 三、XXE 专项
### 基础 Payload
```xml
<?xml version="1.0"?>
<!DOCTYPE foo [
<!ENTITY xxe SYSTEM "file:///etc/passwd">
]>
<foo>&xxe;</foo>
```
### 进阶利用
- 无回显：外部 DTD + 带外（OOB）读取文件
- SSRF：`SYSTEM "http://169.254.169.254/latest/meta-data/"`
- 文件读取：`file:///etc/passwd`、`php://filter/read=convert.base64-encode/resource=config.php`
- 协议：http/ftp/gopher
- Office 文档 XXE：docx/xlsx 内 XML 注入外部实体
### 触发场景
- XML/Excel/CSV 导入
- SOAP 接口
- 文档预览/转换
- SVG 上传（图片上传点也测 XXE）
## 四、原型污染专项（Node.js）
```
__proto__ / constructor.prototype / constructor.prototype.__proto__
```
### 触发场景
- JSON.parse 后深合并（lodash.merge、Object.assign 递归合并）
- 配置合并、查询参数合并
### 利用思路
- 污染 `__proto__.isAdmin=true` / `__proto__.shell=...`
- 污染 `__proto__.env`（pug/ejs 模板引擎 RCE）
- 污染 `Object.prototype` 影响全局校验逻辑
## 五、验证要点
- 反序列化：先确认可控输入点与编码方式，再选 gadget 链验证 RCE
- XXE：先测回显（文件读取），无回显用 OOB DNSLog 验证
- 原型污染：控制台/接口验证 `Object.prototype` 被污染
- 每个 payload 至少尝试到 Level 4 绕过（编码/变形/协议）
## 六、修复建议
- 禁用危险反序列化或使用白名单/黑名单过滤
- XML 解析禁用外部实体（XXE 防护）
- yaml 使用 `SafeLoader`
- 深合并过滤 `__proto__`/`constructor` 键
- 输入校验：拒绝序列化对象格式（按业务白名单）
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: MIT
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
60/100
Promising
Trust
59/100
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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Do not auto-install
Audit
73/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.