Buffer overflow in Ffmpeg
CVE-2021-30123
FFmpeg <=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
- Ffmpeg — versions 4.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- trac.ffmpeg.org/ticket/8845 (Exploit, Vendor Advisory)
- git.videolan.org/
- trac.ffmpeg.org/ticket/8863 (Exploit, Vendor Advisory)
- security.gentoo.org/glsa/202105-24 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30123?
- CVE-2021-30123 is a high-severity vulnerability in Ffmpeg, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-04-07.
- How severe is CVE-2021-30123?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-30123 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.