Adobe Flash - MovieClip Attach init Object Use-After-Free

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1006

The attached file causes a use-after-free in attaching a MovieClip and applying the init object.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/41609.zip