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Use After Free

CVE-2020-21697

Medium
6.5/10

Summary

A heap-use-after-free in the "mpeg_mux_write_packet" function in "libavformat/mpegenc.c" of ffmpeg versions through 4.1.8, 4.2-dev through 4.3.2, and 4.4-dev allows to cause a denial of service (DOS) via a crafted avi file.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • REQUIRED
  • NONE
  • NONE
  • HIGH

CWE-416 - Use After Free

Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.

References

Advisory Timeline

  • Published