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CVE-2021-31887

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethern...

Published: Nov 9, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-170
8.8HIGH
NVD MITRE
EPSS Score
2.4%
Top 16.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

The TCP/IP stack and related services (FTP, TFTP) of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) contain several vulnerabilities, also known as "NUCLEUS:13" and as documented below. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends countermeasures for products where updates are not available.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-170CWE-787

Affected Products

Siemens AG
commercial·DEaka Siemens
Nucleus NET
ICS / OT / IoT
Nucleus Source Code
ICS / OT / IoT
VSTAR
ICS / OT / IoT
APOGEE MBC (PPC) (BACnet)
ICS / OT / IoT
TALON TC Compact (BACnet)
ICS / OT / IoT
TALON TC Modular (BACnet)
ICS / OT / IoT
APOGEE MBC (PPC) (P2 Ethernet):
ICS / OT / IoT
APOGEE MEC (PPC) (BACnet)
ICS / OT / IoT
and 54 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-31887?We can run the check for you — a free external exposure review, no install. Check my exposure

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
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-044112.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/txt/ssa-044112.txt
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf
cert-portal.siemens.com
and 25 more references View all →

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