VDB-179393 · CVE-2021-37220 · Nessus 253619

Artifex MuPDF up to 1.18.1 Cached Color Converter out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Artifex MuPDF up to 1.18.1. Impacted is an unknown function of the component Cached Color Converter. The manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2021-37220. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Artifex MuPDF up to 1.18.1 (Document Reader Software) and classified as critical. This issue affects an unknown code of the component Cached Color Converter. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability.

The weakness was presented 07/22/2021. The advisory is shared at bugs.ghostscript.com. The identification of this vulnerability is CVE-2021-37220. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 253619 (Linux Distros Unpatched Vulnerability : CVE-2021-37220), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.ghostscript.com.

The vulnerability is also documented in the vulnerability database at Tenable (253619). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Document Reader Software

Vendor

Artifex

Name

MuPDF

Version

License

commercial

Website

Vendor: https://artifex.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 253619
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-37220

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.ghostscript.com

Timelineinfo

07/21/2021 🔍
07/22/2021 +1 days 🔍
07/22/2021 +0 days 🔍
08/23/2025 +1493 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: bugs.ghostscript.com
Status: Confirmed

CVE: CVE-2021-37220 (🔍)
GCVE (CVE): GCVE-0-2021-37220
GCVE (VulDB): GCVE-100-179393

Entryinfo

Created: 07/22/2021 13:07
Updated: 08/23/2025 19:31
Changes: 07/22/2021 13:07 (39), 07/27/2021 07:24 (2), 08/23/2025 19:31 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.