Buffer overflow in Saitoha Libsixel

CVE-2020-21548

Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (61.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Saitoha Libsixel — versions 1.8.3
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2020-21548?: CVE-2020-21548 is a high-severity vulnerability in Saitoha Libsixel, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-09-17.
How severe is CVE-2020-21548?: High severity. CVSS v3 base score is 8.8 out of 10.