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

Medium severity · published Sep 14, 2021

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

CVSS

1.4%

EPSS

On KEV

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.4% · higher than 72% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Libsixel · Saitoha

before 1.8.5 · source: NVD

Affected product

Libsixel

Saitoha

All Libsixel CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-21049

CVE.org

https://www.cve.org/CVERecord?id=CVE-2020-21049

Broken Link

https://bitbucket.org/netbsd/pkgsrc/commits/970a81d31ec7498e04d09b6b7771cef35f63cd28

Release Notes

https://github.com/saitoha/libsixel/blob/master/ChangeLog

Patch

https://github.com/saitoha/libsixel/commit/0b1e0b3f7b44233f84e5c9f512f8c90d6bbbe33d

Exploit

https://github.com/saitoha/libsixel/issues/74

Release Notes

https://github.com/saitoha/libsixel/releases/tag/v1.8.5