// For flags

CVE-2021-38432

FATEK Automation Communication Server

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

FATEK Automation Communication Server Versions 1.13 and prior lacks proper validation of user-supplied data, which could result in a stack-based buffer overflow condition and allow an attacker to remotely execute code.

FATEK Automation Communication Server versiones anteriores a 1.13, no comprueban correctamente los datos suministrados por el usuario, que podría resultar en una condición de desbordamiento del búfer en la región stack de la memoria y permitir a un atacante ejecutar código de forma remota

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fatek Automation Communication Server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of data sent to the Facon Server, which listens on port 500 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the FaconSvr process.

*Credits: Natnael Samson (@NattiSamson), working with Trend Micro’s Zero Day Initiative, reported this vulnerability to CISA.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-10 CVE Reserved
  • 2021-10-14 CVE Published
  • 2024-09-16 CVE Updated
  • 2024-11-01 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-121: Stack-based Buffer Overflow
CAPEC
References (1)
URL Tag Source
https://us-cert.cisa.gov/ics/advisories/icsa-21-280-07 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
Fatek
Search vendor "Fatek"
 Communication Server Firmware
Search vendor "Fatek" for product "Communication Server Firmware"
 <= 1.13
Search vendor "Fatek" for product "Communication Server Firmware" and version " <= 1.13"
-
Affected
in Fatek
Search vendor "Fatek"
 Communication Server
Search vendor "Fatek" for product "Communication Server"
--
Safe