In libavformat/rmdec.c in FFmpeg 3.3.3, a DoS in ivr_read_header() due to lack of an EOF (End of File) check might cause huge CPU consumption
Published Aug 31, 2017
6.5
MEDIUMCVSS 3.0
EPSS 1.73%
Description
In libavformat/rmdec.c in FFmpeg 3.3.3, a DoS in ivr_read_header() due to lack of an EOF (End of File) check might cause huge CPU consumption. When a crafted IVR file, which claims a large "len" field in the header but does not contain sufficient backing data, is provided, the first type==4 loop would consume huge CPU resources, since there is no EOF check inside the loop.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.73% (0.01726) | 76.73th | v5 (v2026.06.15) |
| Aug 23, 2026 | 1.90% (0.01901) | 77.83th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.16% (0.00157) | 52.49th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.16% (0.00157) | 51.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.22% (0.00223) | 58.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- http://www.debian.org/security/2017/dsa-3996 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/100627 vdb-entryx_refsource_BID
- https://github.com/FFmpeg/FFmpeg/commit/124eb202e70678539544f6268efc98131f19fa49 x_refsource_CONFIRMPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3996 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/100627 | vdb-entryx_refsource_BID | |
| https://github.com/FFmpeg/FFmpeg/commit/124eb202e70678539544f6268efc98131f19fa49 | x_refsource_CONFIRMPatchThird Party Advisory |
Change history (0)
No recorded changes yet.