FFmpeg through 9.0.2 contains a stack exhaustion vulnerability in av_encryption_init_info_free() in libavutil/encryption_info.c, which recursively frees AVEncryptionInitInfo linked lists built by the MOV demuxer's mov_read_pssh(). Attackers can supply a crafted MP4 file with tens of thousands of small pssh boxes to exhaust the stack and crash the process, while also causing quadratic CPU consumption.
| Version | Score | Severity | Vector String |
|---|---|---|---|
| 4.0 | 5.7 | Medium | CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 3.1 | 4.7 | Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H |