FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to cause denial of service because parse_playlist() accepts Master Playlist tags inside Media Playlists. Attackers can trick victims into opening a crafted self-referencing playlist that endlessly adds variants in hls_read_header(), causing unbounded CPU and I/O consumption.
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
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:*:*:*:*:*:*:*:*
|
— |
8.1.3
|
References 8
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618
disclosure@vulncheck.com
https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517a
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-l…
disclosure@vulncheck.com