CVE-2020-21677

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.28%
Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/saitoha/libsixel/issues/123 patch exploit third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2020-21677?
CVE-2020-21677 has been scored as a medium severity vulnerability.
How to fix CVE-2020-21677?
To fix CVE-2020-21677, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-21677 being actively exploited in the wild?
It is possible that CVE-2020-21677 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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