What is CVE-2020-21677?

CVE-2020-21677 is a medium-severity vulnerability in Saitoha Libsixel, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2021-08-10.

How severe is CVE-2020-21677?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Saitoha Libsixel

CVE-2020-21677

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.

Vulnerability class: Buffer Overflow

EPSS: 0.009 (56.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Saitoha Libsixel — versions 1.8.4
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-2020-21677?: CVE-2020-21677 is a medium-severity vulnerability in Saitoha Libsixel, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2021-08-10.
How severe is CVE-2020-21677?: Medium severity. CVSS v3 base score is 6.5 out of 10.