CVE-2021-45117

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.

Los stubs de pila ANSI C autogenerados por OPC (en los NodeSets) no manejan todos los casos de error. Esto puede conllevar a una desreferencia de puntero NULL

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-16 CVE Reserved
2022-03-21 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-25 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://www.youtube.com/watch?v=qv-RBdCaV4k	2024-08-04

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf	2022-09-03
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-45117.pdf	2022-09-03

URL	Date	SRC

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-nodeset Search vendor "Opcfoundation" for product "Ua-nodeset"				< 1.05.01 Search vendor "Opcfoundation" for product "Ua-nodeset" and version " < 1.05.01"		-		Affected
Siemens Search vendor "Siemens"		Simatic Net Pc Search vendor "Siemens" for product "Simatic Net Pc"				14 Search vendor "Siemens" for product "Simatic Net Pc" and version "14"		-		Affected
Siemens Search vendor "Siemens"		Simatic Net Pc Search vendor "Siemens" for product "Simatic Net Pc"				15 Search vendor "Siemens" for product "Simatic Net Pc" and version "15"		-		Affected
Siemens Search vendor "Siemens"		Simatic Net Pc Search vendor "Siemens" for product "Simatic Net Pc"				16 Search vendor "Siemens" for product "Simatic Net Pc" and version "16"		-		Affected
Siemens Search vendor "Siemens"		Simatic Net Pc Search vendor "Siemens" for product "Simatic Net Pc"				17 Search vendor "Siemens" for product "Simatic Net Pc" and version "17"		-		Affected
Siemens Search vendor "Siemens"		Sitop Manager Search vendor "Siemens" for product "Sitop Manager"				-		-		Affected
Siemens Search vendor "Siemens"		Telecontrol Server Basic Search vendor "Siemens" for product "Telecontrol Server Basic"				3.0 Search vendor "Siemens" for product "Telecontrol Server Basic" and version "3.0"		-		Affected