// For flags

CVE-2023-32787

Prosys OPC UA Simulation Server OpenSecureChannel Resource Exhaustion Denial-of-Service Vulnerability

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

The OPC UA Legacy Java Stack before 6f176f2 enables an attacker to block OPC UA server applications via uncontrolled resource consumption so that they can no longer serve client applications.

El OPC UA Legacy Java Stack anterior a 6f176f2 permite a un atacante bloquear aplicaciones del servidor OPC UA mediante el consumo incontrolado de recursos para que ya no puedan servir aplicaciones cliente.

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Prosys OPC UA Simulation Server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of OpenSecureChannel messages. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

*Credits: Claroty Research - Team82 - Uri Katz, Noam Moshe, Vera Mens, Sharon Brizinov
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:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-05-15 CVE Reserved
  • 2023-05-15 CVE Published
  • 2024-06-16 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Opcfoundation
Search vendor "Opcfoundation"
 Ua Java Legacy
Search vendor "Opcfoundation" for product "Ua Java Legacy"
 < 2023-04-28
Search vendor "Opcfoundation" for product "Ua Java Legacy" and version " < 2023-04-28"
-
Affected
Prosysopc
Search vendor "Prosysopc"
 Ua Historian
Search vendor "Prosysopc" for product "Ua Historian"
 < 1.2.0
Search vendor "Prosysopc" for product "Ua Historian" and version " < 1.2.0"
-
Affected
Prosysopc
Search vendor "Prosysopc"
 Ua Modbus Server
Search vendor "Prosysopc" for product "Ua Modbus Server"
 < 1.4.20
Search vendor "Prosysopc" for product "Ua Modbus Server" and version " < 1.4.20"
-
Affected
Prosysopc
Search vendor "Prosysopc"
 Ua Simulation Server
Search vendor "Prosysopc" for product "Ua Simulation Server"
 < 5.4.2
Search vendor "Prosysopc" for product "Ua Simulation Server" and version " < 5.4.2"
-
Affected