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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 50%
VendorProductVersion
libsixel_projectlibsixel
1.8.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libsixel
bullseye
1.8.6-2
fixed
buster
no-dsa
stretch
no-dsa
sid
1.10.3-3
fixed
trixie
1.10.3-3
fixed
bookworm
1.10.3-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libsixel
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
focal
needs-triage
bionic
needs-triage
xenial
needs-triage
trusty
dne
Common Weakness Enumeration
References
https://github.com/saitoha/libsixel/issues/123
https://github.com/saitoha/libsixel/issues/123