CVE-2021-45117

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

Published: Mar 21, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-476

6.5MEDIUM

Description

A vulnerability in the underlying third party component OPC UA ANSIC Stack (also called Legacy C-Stack) affects several industrial products. The vulnerability could cause a crash of the component that includes the vulnerable part of the stack. Siemens has released updates for the affected products and recommends to update to the latest versions.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-476

Affected Products

siemens

commercial·DEaka siemens ag

telecontrol server basic

ICS / OT / IoT

opcfoundation

oss-project

ua-nodesetMixed

OSS Libraries / generic-library

OPC Foundation

oss-projectaka opc ua

OPC UAOn-prem

ICS / OT / IoT / industrial-network

and 1 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques

Impact

Initial Access

View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-285795.json

cert-portal.siemens.com

https://cert-portal.siemens.com/productcert/html/ssa-285795.html

cert-portal.siemens.com

https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf

cert-portal.siemens.com

and 13 more references View all →

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