select * from admin where username='1 or '1'='1' and password='"&pwd&"'" |
net user xp_cmdshell /add exec master.dbo.xp_cmdshell net localgroup administrators select count Asc char mid ' : " insert delete from drop table update truncate from % |
[CODE START] <script language="javascript"> <!-- var url = location.search; var re=/^\?(.*)(select%20|insert%20|delete%20from%20|count\(|drop%20table |update%20truncate%20|asc\(|mid\(|char\(|xp_cmdshell|exec%20master |net%20localgroup%20administrators|\"|:|net%20user|\'|%20or%20)(.*)$/gi; var e = re.test(url); if(e) { alert("地址中含有非法字符~"); location.href="error.asp"; } //--> <script> [CODE END] |
[CODE START] <% On Error Resume Next Dim strTemp If LCase(Request.ServerVariables("HTTPS")) = "off" Then strTemp = "http://" Else strTemp = "https://" End If strTemp = strTemp & Request.ServerVariables("SERVER_NAME") If Request.ServerVariables("SERVER_PORT") <> 80 Then strTemp = strTemp & ":" & Request.ServerVariables("SERVER_PORT") strTemp = strTemp & Request.ServerVariables("URL") If Trim(Request.QueryString) <> "" Then strTemp = strTemp & "?" & Trim(Request.QueryString) strTemp = LCase(strTemp) If Instr(strTemp,"select%20") or Instr(strTemp,"insert%20") or Instr(strTemp,"delete%20from") or Instr(strTemp,"count(") or Instr(strTemp,"drop%20table") or Instr(strTemp,"update%20") or Instr(strTemp,"truncate%20") or Instr(strTemp,"asc(") or Instr(strTemp,"mid(") or Instr(strTemp,"char(") or Instr(strTemp,"xp_cmdshell") or Instr(strTemp,"exec%20master") or Instr(strTemp,"net%20localgroup%20administrators") or Instr(strTemp,":") or Instr(strTemp,"net%20user") or Instr(strTemp,"'") or Instr(strTemp,"%20or%20") then Response.Write "<script language='javascript'>" Response.Write "alert('非法地址!!');" Response.Write "location.href='error.asp';" Response.Write "<script>" End If %> [CODE END] |
bool CheckParams(params object[] args) { string[] Lawlesses={"=","'"}; if(Lawlesses==null||Lawlesses.Length<=0)return true; //构造正则表达式,例:Lawlesses是=号和'号,则正则表达式为 .*[=}'].* (正则表达式相关内容请见MSDN) //另外,由于我是想做通用而且容易修改的函数,所以多了一步由字符数组到正则表达式,实际使用中,直接写正则表达式亦可; String str_Regex=".*["; for(int i=0;i< Lawlesses.Length-1;i++) str_Regex+=Lawlesses[i]+"|"; str_Regex+=Lawlesses[Lawlesses.Length-1]+"].*"; // foreach(object arg in args) { if(arg is string)//如果是字符串,直接检查 { if(Regex.Matches(arg.ToString(),str_Regex).Count>0) return false; } else if(arg is ICollection) //如果是一个集合,则检查集合内元素是否字符串,是字符串,就进行检查 { foreach(object obj in (ICollection)arg) { if(obj is string) { if(Regex.Matches(obj.ToString(),str_Regex).Count>0) return false; } } } } return true; |