CVE-2020-21677
6.5
MEDIUM
CVSS 3.1
EPSS 0.28%
Description
A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.
How to fix CVE-2020-21677
To remediate CVE-2020-21677, upgrade the affected package to a fixed version below.
- Debian/libsixel—upgrade to 1.8.6-1 or later
Is CVE-2020-21677 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.8.6-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |