// For flags

CVE-2021-29453

Denial of service through memory exhaustion

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

matrix-media-repo is an open-source multi-domain media repository for Matrix. Versions 1.2.6 and earlier of matrix-media-repo do not properly handle malicious images which are crafted to be small in file size, but large in complexity. A malicious user could upload a relatively small image in terms of file size, using particular image formats, which expands to have extremely large dimensions during the process of thumbnailing. The server can be exhausted of memory in the process of trying to load the whole image into memory for thumbnailing, leading to denial of service. Version 1.2.7 has a fix for the vulnerability.

matrix-media-repo es un repositorio de medios multidominio de código abierto para Matrix. Versiones 1.2.6 y anteriores de matrix-media-repo, no manejan apropiadamente imágenes maliciosas que son diseñadas para ser de tamaño pequeño pero de gran complejidad. Un usuario malicioso podría cargar una imagen relativamente pequeña en términos de tamaño de archivo, usando formatos de imagen particulares, que se expande para tener dimensiones extremadamente grandes durante el proceso de thumbnailing. El servidor puede ser agotado de la memoria en el proceso de intentar cargar la imagen completa en la memoria por un thumbnailing, conllevando a una denegación de servicio. Versión 1.2.7 contiene una corrección para la vulnerabilidad

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-03-30 CVE Reserved
  • 2021-04-19 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-770: Allocation of Resources Without Limits or Throttling
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Matrix-media-repo Project
Search vendor "Matrix-media-repo Project"
 Matrix-media-repo
Search vendor "Matrix-media-repo Project" for product "Matrix-media-repo"
 < 1.2.7
Search vendor "Matrix-media-repo Project" for product "Matrix-media-repo" and version " < 1.2.7"
-
Affected