// For flags

CVE-2021-20108

 

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

Manage Engine Asset Explorer Agent 1.0.34 listens on port 9000 for incoming commands over HTTPS from Manage Engine Server. The HTTPS certificates are not verified which allows any arbitrary user on the network to send commands over port 9000. While these commands may not be executed (due to authtoken validation), the Asset Explorer agent will reach out to the manage engine server for an HTTP request. During this process, AEAgent.cpp allocates 0x66 bytes using "malloc". This memory is never free-ed in the program, causing a memory leak. Additionally, the instruction sent to aeagent (ie: NEWSCAN, DELTASCAN, etc) is converted to a unicode string, but is never freed. These memory leaks allow a remote attacker to exploit a Denial of Service scenario through repetitively sending these commands to an agent and eventually crashing it the agent due to an out-of-memory condition.

Manage Engine Asset Explorer Agent versión 1.0.34, escucha en el puerto 9000 los comandos entrantes sobre HTTPS desde el Servidor de Manage Engine. Los certificados HTTPS no están comprobados, lo que permite a cualquier usuario arbitrario de la red enviar comandos a través del puerto 9000. Mientras que estos comandos no pueden ser ejecutados (debido a la comprobación de authtoken), el agente de Asset Explorer llegará al servidor del motor de administración para una petición HTTP. Durante este proceso, el archivo AEAgent.cpp asigna 0x66 bytes usando "malloc". Esta memoria nunca se libera en el programa, causando una pérdida de memoria. Adicionalmente, la instrucción enviada a aeagent (es decir, NEWSCAN, DELTASCAN, etc) es convertida en una cadena unicode, pero nunca se libera. Estas pérdidas de memoria permiten a un atacante remoto explotar un escenario de Denegación de Servicio mediante el envío repetitivo de estos comandos a un agente y eventualmente bloquearlo debido a una condición de falta de memoria

*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
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
  • 2020-12-17 CVE Reserved
  • 2021-07-19 CVE Published
  • 2024-04-03 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-401: Missing Release of Memory after Effective Lifetime
CAPEC
References (1)
URL Tag Source
https://www.tenable.com/security/research/tra-2021-29 Third Party Advisory
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Zohocorp
Search vendor "Zohocorp"
 Manageengine Assetexplorer
Search vendor "Zohocorp" for product "Manageengine Assetexplorer"
 1.0.34
Search vendor "Zohocorp" for product "Manageengine Assetexplorer" and version "1.0.34"
-
Affected