7.5
HIGH
CVE-2023-32787
"OPC UA Java Stack Denial of Service Vulnerability"
Description

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.

INFO

Published Date :

May 15, 2023, 3:15 p.m.

Last Modified :

April 2, 2024, 2:49 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-32787 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-32787 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Prosysopc ua_modbus_server
2 Prosysopc ua_simulation_server
3 Prosysopc ua_historian
1 Opcfoundation ua_java_legacy
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-32787.

URL Resource
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-32787.pdf Patch Vendor Advisory
https://github.com/OPCFoundation/UA-Java-Legacy Product
https://github.com/OPCFoundation/UA-Java-Legacy/commit/6f176f2b445a27c157f1a32f225accc9ce8873c0 Patch

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Claroty opc ua exploit framework add KOR comment

Python Shell

Updated: 1 month, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 24, 2024, 4:19 p.m. This repo has been linked 24 different CVEs too.

Advanced OPC-UA framework for vulnerability research & exploitation

Python Shell

Updated: 2 months, 1 week ago
40 stars 8 fork 8 watcher
Born at : June 7, 2023, 1:15 p.m. This repo has been linked 24 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-32787 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-32787 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Apr. 02, 2024

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:prosysopc:ua_historian:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.0 *cpe:2.3:a:prosysopc:ua_modbus_server:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.20 *cpe:2.3:a:prosysopc:ua_simulation_server:*:*:*:*:*:*:*:* versions up to (excluding) 5.4.2
  • Initial Analysis by [email protected]

    May. 24, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-32787.pdf No Types Assigned https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-32787.pdf Patch, Vendor Advisory
    Changed Reference Type https://github.com/OPCFoundation/UA-Java-Legacy No Types Assigned https://github.com/OPCFoundation/UA-Java-Legacy Product
    Changed Reference Type https://github.com/OPCFoundation/UA-Java-Legacy/commit/6f176f2b445a27c157f1a32f225accc9ce8873c0 No Types Assigned https://github.com/OPCFoundation/UA-Java-Legacy/commit/6f176f2b445a27c157f1a32f225accc9ce8873c0 Patch
    Added CWE NIST CWE-400
    Added CPE Configuration OR *cpe:2.3:a:opcfoundation:ua_java_legacy:*:*:*:*:*:*:*:* versions up to (excluding) 2023-04-28
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-32787 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-32787 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.20 }} 0.02%

score

0.57217

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability