新手入门：防范SQL注入攻击的新办法

来源：论坛整理作者：出处：巧巧读书 2007-07-20 进入讨论组

访问 http://www.qqread.com/sqlserver/2007/03/a305644.html

　　近段时间由于修改一个ASP程序(有SQL注入漏洞)，在网上找了很多相关的一些防范办法，都不近人意，所以我将现在网上的一些方法综合改良了一下，写出这个ASP函数，供大家参考。

以下是引用片段：
Function SafeRequest(ParaName)
Dim ParaValue
ParaValue=Request(ParaName)
if IsNumeric(ParaValue) = True then
SafeRequest=ParaValue
exit Function
elseIf Instr(LCase(ParaValue),"select ") > 0 or Instr(LCase(ParaValue),"insert ") > 0 or Instr(LCase(ParaValue),"delete from") > 0 or Instr(LCase(ParaValue),"count(") > 0 or Instr(LCase(ParaValue),"drop table") > 0 or Instr(LCase(ParaValue),"update ") > 0 or Instr(LCase(ParaValue),"truncate ") > 0 or Instr(LCase(ParaValue),"asc(") > 0 or Instr(LCase(ParaValue),"mid(") > 0 or Instr(LCase(ParaValue),"char(") > 0 or Instr(LCase(ParaValue),"xp_cmdshell") > 0 or Instr(LCase(ParaValue),"exec master") > 0 or Instr(LCase(ParaValue),"net localgroup administrators") > 0  or Instr(LCase(ParaValue)," and ") > 0 or Instr(LCase(ParaValue),"net user") > 0 or Instr(LCase(ParaValue)," or ") > 0 then
Response.Write "<script language='javascript'>"
Response.Write "alert('非法的请求!');"  '发现SQL注入攻击提示信息
Response.Write "location.href='http://dev.yesky.com/';"  '发现SQL注入攻击转跳网址
Response.Write "<script>"
Response.end
else
SafeRequest=ParaValue
End If
End function

　　使用SafeRequest函数替换你的Request