1.如何批量删除数据库中被注入的代码?在数据库查询分析器运行这段代码即可
DECLARE @fieldtype sysname
SET @fieldtype=''varchar''
--删除处理
DECLARE hCForEach CURSOR GLOBAL
FOR
SELECT N''update ''+QUOTENAME(o.name)
+N'' set ''+ QUOTENAME(c.name) + N'' = replace('' + QUOTENAME(c.name) + '',''''<script_src=http://ucmal.com/0.js> </script>'''','''''''')''
FROM sysobjects o,syscolumns c,systypes t
WHERE o.id=c.id
AND OBJECTPROPERTY(o.id,N''IsUserTable'')=1
AND c.xusertype=t.xusertype
AND t.name=@fieldtype
EXEC sp_MSforeach_Worker @command1=N''?''
2.创建一个触发器,只要有</script>就不给插入,对性能会有点影响
create trigger tr_table_insertupdate
on tablename
for insert,update
as
if exists (
select 1 from inserted
where data like ''%</script>%''
)
begin
RAISERROR (''不能修改或者添加'',16,1);
ROLLBACK TRANSACTION
end
go
3.最重要的还是程序的写法,用参数化SQL或存储过程
例如
protected void cmdok_Click(object sender, EventArgs e)
{
//添加信息
StringBuilder sql = new StringBuilder( " insert into m_phone ( pid,PhoneName,num,price,phonetype,onSellTime,color,weight,Video,Camera,phoneSize,phoneSystem,Memorysize,PhoneDesc,Standbytime,ScreenSize,Frequency,InputMethod,Soundrecord,gps,fm,mp3,email,Infrared,game,clock,Calendar,Calculator,Bluetooth) ");
sql.Append(" values (@pid,@TextPhoneName,@Textnum,@Textprice,@Dropphonetype2,@TextonSellTime,@Textcolor,@Textweight ");
.................
SqlParameter[] paras = { new SqlParameter("@pid", SqlDbType.Int, 4) ,
new SqlParameter("@TextPhoneName", SqlDbType.NVarChar, 50) ,
new SqlParameter("@Textnum", SqlDbType.Int, 4) ,
new SqlParameter("@Textprice", SqlDbType.Int, 4) ,
new SqlParameter("@Dropphonetype2", SqlDbType.VarChar, 20) ,
new SqlParameter("@TextonSellTime", SqlDbType.DateTime, 8) ,
new SqlParameter("@Textcolor", SqlDbType.VarChar, 20) ,
new SqlParameter("@Textweight", SqlDbType.NVarChar, 50) ,
...........
};
string[] stra = {Dropphonetype.SelectedValue,TextPhoneName.Text , Textnum.Text, Textprice.Text, Dropphonetype2.SelectedValue, TextonSellTime.Text, Textcolor.Text, Textweight.Text,
.............};
int a=stra.Length;
int j;
for ( j = 0; j < a; j++)
{
paras[j].Value = stra[j];
}
int strpid = 0;
string sqla = sql.ToString();
try
{
SqlHelper.ExcuteNonQurey(sqla, CommandType.Text, paras);//执行添加数据
strpid = Convert.ToInt32(SqlHelper.ExcuteSclare(sqla, CommandType.Text, paras)); //获取刚才插入的id号
}
catch (SqlException ex)
{
cmdreturn.Text = ex.Message.ToString();
}
cmdreturn.Text = strpid.ToString();
。。。。。。。。。
|