sql注入数据库修复方法 - 新一

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=\'<script src=http://www.111cn.net/js/common.js></script>\' --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=\'</title><style>.\' --被注入的字段串的开始采样，从此位置后面的数据都为注入数据

/**********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