FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass protocol and allowed_extensions restrictions when opening child playlists. Attackers can supply a crafted master playlist whose child playlists use disallowed protocols or non-multimedia local files, making parse_playlist() open resources the HLS security policy should block.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Ffmpeg Ffmpeg
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
|
— |
8.1.3
|
References 6
https://github.com/FFmpeg/FFmpeg
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/01044d04536e
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/191715f0232c
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-c…
disclosure@vulncheck.com