memory leaks in MP4_ReadBox_sample_vide

[moonflowersl]

• Describe the bug
  We (School of Cyber Science and Technology, Shandong University) found that MP4_ReadBox_sample_video can cause memory leaks when it processes malformed messages.

• Expected behavior
  If Asan is enabled at compile time, the MP4_ReadBox_sample_video crashes and displays ASAN information.

• Actual Behavior

  If Asan is enabled at compile time, the MP4_ReadBox_sample_video crashes and displays ASAN information, which can cause memory leaks.

  

• To Reproduce

  Similarly, we will upload a vulnerability POC to https://drive.google.com/file/d/14CP_REpo6tKo-PjyeA2gpTEjWBGQJtVq/view?usp=share_link to help developers fix this vulnerability.

• Environment Details

  • Version: master branch
  • Operating system and version：Ubuntu 20.04
  • Compiler and language used：gcc 9.4.0