In libavformat/rmdec.c in FFmpeg 3.3.3, a DoS in ivr_read_header() due to lack of an EOF (End of File) check might cause huge CPU consumption. When a crafted IVR file, which claims a large len field in the header but does not contain sufficient backing data, is provided, the first type==4 loop would consume huge CPU resources, since there is no EOF check inside the loop.
The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ffmpeg | Ffmpeg | 3.3.3 (including) | 3.3.3 (including) |
| Ffmpeg | Ubuntu | artful | * |
| Ffmpeg | Ubuntu | zesty | * |