CVE-2020-21548 describes a heap-based buffer overflow in the sixel_encode_highcolor function within Libsixel 1.8.3. This vulnerability carries a CVSS score of 8.8 (High), indicating it can be exploited remotely with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the vulnerability remains a critical concern for affected libsixel_project libsixel installations.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.8.3CPE matchmatch criteria | cpe:2.3:a:saitoha:libsixel:1.8.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.