CVE-2020-25674

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

WriteOnePNGImage() from coders/png.c (the PNG coder) has a for loop with an improper exit condition that can allow an out-of-bounds READ via heap-buffer-overflow. This occurs because it is possible for the colormap to have less than 256 valid values but the loop condition will loop 256 times, attempting to pass invalid colormap data to the event logger. The patch replaces the hardcoded 256 value with a call to MagickMin() to ensure the proper value is used. This could impact application availability when a specially crafted input file is processed by ImageMagick. This flaw affects ImageMagick versions prior to 7.0.8-68.

La función WriteOnePNGImage() del archivo coders/png.c (el codificador PNG) presenta un bucle for con una condición de salida inapropiada que puede permitir una LECTURA fuera de límites por medio de un desbordamiento del búfer de la pila. Esto ocurre porque es posible que el mapa de colores tenga menos de 256 valores válidos, pero la condición de bucle se repetirá 256 veces, intentando pasar datos del mapa de colores no válidos al registrador de eventos. El parche reemplaza el valor 256 embebido con una llamada a la función MagickMin() para garantizar que se utilice el valor apropiado. Esto podría afectar la disponibilidad de la aplicación cuando ImageMagick procesa un archivo de entrada especialmente diseñado. Este fallo afecta a ImageMagick versiones anteriores a 7.0.8-68

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-16 CVE Reserved
2020-12-08 CVE Published
2023-08-24 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-122: Heap-based Buffer Overflow

CAPEC

References (3)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/01/msg00010.html	Mailing List
https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html	Mailing List

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1891928	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Imagemagick Search vendor "Imagemagick"		Imagemagick Search vendor "Imagemagick" for product "Imagemagick"				< 6.9.10-68 Search vendor "Imagemagick" for product "Imagemagick" and version " < 6.9.10-68"		-		Affected
Imagemagick Search vendor "Imagemagick"		Imagemagick Search vendor "Imagemagick" for product "Imagemagick"				>= 7.0.0-0 < 7.0.8-68 Search vendor "Imagemagick" for product "Imagemagick" and version " >= 7.0.0-0 < 7.0.8-68"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected