6.5

CVE-2020-21049: saitoha libsixel Out-of-bounds Read

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2020-21049DEBIAN-CVE-2020-21049
Published 14-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-21049 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in saitoha libsixel. EPSS estimates a 1.38% chance of exploitation in the next 30 days, higher than 71.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.38%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 14-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An invalid read in the stb_image.h component of libsixel prior to v1.8.5 allows attackers to cause a denial of service (DOS) via a crafted PSD file.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.38%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

-0.01 pp

From 1.38% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Libsixel

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • libsixel< 1.8.6-1
Saitoha1 product
Ubuntu1 product
  • libsixelAll versions (No fix recorded)

3 vendors · 3 products

References

8 links