CVE-2020-21677 — Out-of-bounds Write in Project Libsixel

CWE-787 — Out-of-bounds Write5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
0.3%
top 48.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Libsixel Project Libsixel
Timeline
PublishedAug 10
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶Debianlibsixel_project/libsixel< 1.8.6-1+3

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-j9fq-4p85-2pqh: A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder↗2022-05-24
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OSV
CVE-2020-21677: A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder↗2021-08-10
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CVEList
CVE-2020-21677: A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder↗2021-08-10
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📋Vendor Advisories

1
Debian
CVE-2020-21677: libsixel - A heap-based buffer overflow in the sixel_encoder_output_without_macro function ...↗2020
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CVE-2020-21677 — Out-of-bounds Write | cvebase