CVE-2020-21049

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2020-21049
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.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28 Broken Link
https://github.com/saitoha/libsixel/blob/master/ChangeLog Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d Patch Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/issues/74 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/saitoha/libsixel/releases/tag/v1.8.5 Release Notes Third Party Advisory
https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28 Broken Link
https://github.com/saitoha/libsixel/blob/master/ChangeLog Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d Patch Release Notes Third Party Advisory
https://github.com/saitoha/libsixel/issues/74 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/saitoha/libsixel/releases/tag/v1.8.5 Release Notes Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:saitoha:libsixel:*:*:*:*:*:*:*:*
History

24 Apr 2026, 13:34

Type Values Removed Values Added
First Time Saitoha
Saitoha libsixel
CPE cpe:2.3:a:libsixel_project:libsixel:*:*:*:*:*:*:*:* cpe:2.3:a:saitoha:libsixel:*:*:*:*:*:*:*:*

21 Nov 2024, 05:12

Type Values Removed Values Added
References () https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28 - Broken Link () https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28 - Broken Link
References () https://github.com/saitoha/libsixel/blob/master/ChangeLog - Release Notes, Third Party Advisory () https://github.com/saitoha/libsixel/blob/master/ChangeLog - Release Notes, Third Party Advisory
References () https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d - Patch, Release Notes, Third Party Advisory () https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d - Patch, Release Notes, Third Party Advisory
References () https://github.com/saitoha/libsixel/issues/74 - Exploit, Issue Tracking, Patch, Third Party Advisory () https://github.com/saitoha/libsixel/issues/74 - Exploit, Issue Tracking, Patch, Third Party Advisory
References () https://github.com/saitoha/libsixel/releases/tag/v1.8.5 - Release Notes, Third Party Advisory () https://github.com/saitoha/libsixel/releases/tag/v1.8.5 - Release Notes, Third Party Advisory
Information

Published : 2021-09-14 16:15

Updated : 2026-04-24 13:34

NVD link : CVE-2020-21049

Mitre link : CVE-2020-21049

CVE.ORG link : CVE-2020-21049

JSON object : View

Products Affected

saitoha

  • libsixel
CWE
CWE-125

Out-of-bounds Read