CVE-2020-21677
MEDIUM6.5EPSS 0.28%Published: 8/10/2021Modified: 4/28/2026
Also known as:DEBIAN-CVE-2020-21677
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.
Affected packages (1)
- Debian/libsixelfrom 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 |