CVE-2020-21677

MEDIUM

Libsixel 1.8.4 - Heap-Based Buffer Overflow in sixel_encoder_output_without_macro

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://github.com/saitoha/libsixel/issues/123

Scores

CVSS v3 6.5
EPSS 0.0090
EPSS Percentile 55.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-787
Status published
Products (2)
libsixel_project/libsixel 1.8.4
saitoha/libsixel 1.8.4
Published Aug 10, 2021
Tracked Since Feb 18, 2026