// For flags

CVE-2021-4040

Broker: Malformed message can result in partial DoS (OOM)

Severity Score

5.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.

Se ha encontrado un fallo en AMQ Broker. Este problema puede causar una interrupción parcial de la disponibilidad de AMQ Broker por medio de una condición de Out of memory (OOM). Este fallo permite a un atacante interrumpir parcialmente la disponibilidad del broker mediante un ataque sostenido de mensajes maliciosamente diseñados. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema.

AMQ Broker is a high-performance messaging implementation based on ActiveMQ Artemis. It uses an asynchronous journal for fast message persistence, and supports multiple languages, protocols, and platforms. This release of Red Hat AMQ Broker 7.10.0 serves as a replacement for Red Hat AMQ Broker 7.9.4, and includes security and bug fixes, and enhancements. For further information, refer to the release notes linked to in the References section. Issues addressed include HTTP request smuggling and denial of service vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-02 CVE Reserved
  • 2022-06-20 CVE Published
  • 2024-08-03 CVE Updated
  • 2025-06-20 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Redhat
Search vendor "Redhat"
 Amq Broker
Search vendor "Redhat" for product "Amq Broker"
 < 7.10.0
Search vendor "Redhat" for product "Amq Broker" and version " < 7.10.0"
-
Affected
Apache
Search vendor "Apache"
 Activemq Artemis
Search vendor "Apache" for product "Activemq Artemis"
 < 2.19.1
Search vendor "Apache" for product "Activemq Artemis" and version " < 2.19.1"
-
Affected