The restore_tqb_pixels function in hevc_filter.c in libavcodec, as used in libbpg 0.9.8 and other products, has an integer overflow that leads to a heap-based buffer overflow and remote code execution.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://drive.google.com/open?id=1J3hTt8XHz7u7QDSNYxEuwFZTO6Baggl0 | third party advisory |
| https://github.com/ebel34/bpg-web-encoder/issues/2 | issue tracking exploit third party advisory |