FFmpeg through 9.0.2 contains a denial of service vulnerability in the DASH demuxer that allows attackers to trigger an infinite loop by supplying an empty SegmentTemplate media URL. Attackers can craft an .mpd manifest declaring SegmentTemplate media="" so get_current_fragment() calls av_strireplace() with an empty search string, consuming CPU indefinitely.
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 6
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/ed27bfcbbbc0872c0195eaf4dd2c0c93b9…
disclosure@vulncheck.com
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24592
disclosure@vulncheck.com
https://ffmpeg.org/
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/dashdec.c#L1726
disclosure@vulncheck.com
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/avstring.c#L230-L238
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-dash-demuxer-infinite…
disclosure@vulncheck.com