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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
NVD MITRE
EPSS Score
1.4%
Top 31.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
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
Open in CVSS calculator →

Weaknesses

CWE-476

Affected Products

siemens
commercial·DEaka siemens ag
simatic net pc
ICS / OT / IoT
sitop manager
ICS / OT / IoT
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 →
News mentions
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