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sql注入数据库修复方法

  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

  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='