// For flags

CVE-2021-20237

 

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denial of service. The highest threat from this vulnerability is to system availability.

Se encontró un fallo de consumo de recursos incontrolado (filtrado de memoria) en el archivo src/xpub.cpp de ZeroMQ en versiones anteriores a 4.3.3. Este fallo permite a un atacante remoto no autenticado enviar mensajes PUB diseñados que consumen memoria excesiva si la autenticación CURVE/ZAP está deshabilitada en el servidor, causando una denegación de servicio. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
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
  • 2020-12-17 CVE Reserved
  • 2021-05-28 CVE Published
  • 2024-05-16 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-401: Missing Release of Memory after Effective Lifetime
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Zeromq
Search vendor "Zeromq"
 Libzmq
Search vendor "Zeromq" for product "Libzmq"
 >= 4.2.0 < 4.3.3
Search vendor "Zeromq" for product "Libzmq" and version " >= 4.2.0 < 4.3.3"
-
Affected