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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Ffmpeg Ffmpeg
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
|
— |
<= 9.0.2
|
References 5
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24593
disclosure@vulncheck.com
https://ffmpeg.org/
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/mov.c#L8070
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/encryption_info.c#L219-L…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-stack-exhaustion-via-…
disclosure@vulncheck.com