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CVE-2021-27434

Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, ...

Published: May 20, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-200
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.7%
Top 25.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-200CWE-674

Affected Products

OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5n/a
TS6100Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TF6100Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TF3300Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TF6720Beckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
beckhoff automation gmbh & co. kgcommercialDEICS / OT / IoTaka beckhoff, twincat
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Impact
View detailed technique mapping

References

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-133-04.json
raw.githubusercontent.com
https://www.cisa.gov/news-events/ics-advisories/icsa-21-133-04
cisa.gov
https://us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01
us-cert.cisa.gov
and 9 more references View all →

Timeline

Published
May 20, 2021
Last Updated
Nov 21, 2024

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