Vulnerability in Ffmpeg
CVE-2021-38171
adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Ffmpeg — versions 4.4
- Debian Linux — versions 9.0, 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F1…
- github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6 (Patch, Third Party Advisory)
- www.debian.org/security/2021/dsa-4990 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4998 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/11/msg00012.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202312-14 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-38171?
- CVE-2021-38171 is a critical-severity vulnerability in Ffmpeg, classified under CWE-252. CVSS score: 9.8/10. Published 2021-08-21.
- How severe is CVE-2021-38171?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-38171 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.