CVE-2021-33657

Gentoo Linux Security Advisory 202305-18

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.

Se presenta un problema de desbordamiento de pila en el archivo video/SDL_pixels.c en SDL (Simple DirectMedia Layer) versiones 2.x a 2.0.18. Al diseñar un archivo .BMP malicioso, un atacante puede causar el bloqueo de la aplicación que usa esta biblioteca, una denegación de servicio o una ejecución de Código

An update that fixes three vulnerabilities is now available. This update for SDL fixes the following issues. Fixed an integer overflow (and resultant SDL_memcpy heap corruption) in SDL_BlitCopy in video/SDL_blit_copy.c. Fixed a heap-based buffer over-read in Blit_3or4_to_3or4__inversed_rgb in video/SDL_blit_N.c. Fixed a Heap overflow problem in video/SDL_pixels.c.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-28 CVE Reserved
2022-04-01 CVE Published
2024-08-03 CVE Updated
2025-08-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (4)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/02/msg00008.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/libsdl-org/SDL/commit/8c91cf7dba5193f5ce12d06db1336515851c9ee9	2023-05-03

URL	Date	SRC
https://security.gentoo.org/glsa/202305-17	2023-05-03
https://security.gentoo.org/glsa/202305-18	2023-05-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libsdl Search vendor "Libsdl"		Simple Directmedia Layer Search vendor "Libsdl" for product "Simple Directmedia Layer"				>= 2.0.0 <= 2.0.18 Search vendor "Libsdl" for product "Simple Directmedia Layer" and version " >= 2.0.0 <= 2.0.18"		-		Affected