// For flags

CVE-2023-5632

Unconditionally adding an event to the epoll causes excessive CPU consumption

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6

En Eclipse Mosquito anterior a 2.0.5 incluida, establecer una conexión con el servidor mosquitto sin enviar datos provoca que se agregue el evento EPOLLOUT, lo que resulta en un consumo excesivo de CPU. Esto podría ser utilizado por un actor malintencionado para realizar un ataque de tipo de denegación de servicio. Este problema se solucionó en 2.0.6.

*Credits: Przemysław Zygmunt (acsoftware.pl)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-10-18 CVE Reserved
  • 2023-10-18 CVE Published
  • 2024-09-13 CVE Updated
  • 2024-09-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-834: Excessive Iteration
CAPEC
  • CAPEC-130: Excessive Allocation
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Eclipse
Search vendor "Eclipse"
 Mosquitto
Search vendor "Eclipse" for product "Mosquitto"
 < 2.0.6
Search vendor "Eclipse" for product "Mosquitto" and version " < 2.0.6"
-
Affected