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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=759

There is a use-after-free in MovieClip.duplicateMovieClip.If an action associated with the MovieClip frees the clip provided as the initObject parameter to the call, it will be used after it is freed.A PoC is attached.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39779.zip