Vulnerability Details : CVE-2020-21697
A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2020-21697
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-21697
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 50 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-21697
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2020-21697
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-21697
-
https://www.debian.org/security/2021/dsa-4998
Debian -- Security Information -- DSA-4998-1 ffmpegThird Party Advisory
-
https://trac.ffmpeg.org/ticket/8188
#8188 (heap-use-after-free from libavformat/mpegenc.c in mpeg_mux_write_packet) – FFmpegExploit;Issue Tracking;Patch;Vendor Advisory
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