Adobe Flash - MP4 AMF Parsing Overflow

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1018

There is an overflow in MP4 AMF parsing. To reproduce, put the attached files on a server and visit http://127.0.0.1/LoadMP4.swf?file=unsigned.mp4.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/41420.zip