sql盲注如何修补_sql注入数据库修复的两种实例方法

1.第一种情况是 需要将指定的 注入字符串全部替换掉(仅替换注入的字符串为空)

declare @delStr nvarchar(500)

set @delStr='' --这里被注入的字段串

/****************************************/

/**********以下为操作实体************/

set nocount on

declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int

declare @sql nvarchar(2000)

set @iResult=0

declare cur cursor for

select name,id from sysobjects where xtype='U'

open cur

fetch next from cur into @tableName,@tbID

while @@fetch_status=0

begin

declare cur1 cursor for

select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID

open cur1

fetch next from cur1 into @columnName

while @@fetch_status=0

begin

set @sql='update [' + @tableName + '] set ['+ @columnName +']= SUBSTRING([' + @columnName + '],' + '1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) + ' + 'SUBSTRING([' + @columnName + '], PATINDEX( ''%' + @delStr + '%'', [' + @columnName + ']) + ' + 'len(''' + @delStr + ''') , datalength([' + @columnName + '])) where ['+@columnName+'] like ''%'+@delStr+'%'''

exec sp_executesql @sql

set @iRow=@@rowcount

set @iResult=@iResult+@iRow

if @iRow>0

begin

print '表:'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'条记录;'

end

fetch next from cur1 into @columnName

end

close cur1

deallocate cur1

fetch next from cur into @tableName,@tbID

end

print '数据库教程共有'+convert(varchar(10),@iResult)+'条记录被更新!!!'

close cur

deallocate cur

set nocount off

2.第二种是  需要将注入到表中起始位置到最后都删掉。(此种方法直接找到注入的起始位置,后面的全部删掉)

--恢复被注入数据库

--2013-09-26

declare @delStr nvarchar(500)

set @delStr='

/**********以下为操作实体************/

set nocount on

declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int

declare @sql nvarchar(2000)

set @iResult=0

declare cur cursor for

select name,id from sysobjects where xtype='U'

open cur

fetch next from cur into @tableName,@tbID

while @@fetch_status=0

begin

declare cur1 cursor for

select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID

open cur1

fetch next from cur1 into @columnName

while @@fetch_status=0

begin

set @sql='update [' + @tableName + '] set ['+ @columnName +']=

SUBSTRING([' + @columnName + '],1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1)   where ['+@columnName+'] like ''%'+@delStr+'%'''

exec sp_executesql @sql

set @iRow=@@rowcount

set @iResult=@iResult+@iRow

if @iRow>0

begin

print '表:'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'条记录;'

end

fetch next from cur1 into @columnName

end

close cur1

deallocate cur1

fetch next from cur into @tableName,@tbID

end

print '数据库教程共有'+convert(varchar(10),@iResult)+'条记录被更新!!!'

close cur

deallocate cur

set nocount off

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