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CVE-2021-33737

Published: Sep 14, 2021Updated: Nov 21, 2024 Sources: CVE List NVD csafCWE-119
7.5HIGH
NVD MITRE
EPSS Score
1.0%
Top 40.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.

No summary for this CVE yet.

CVSS Vector Breakdown

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

Weaknesses

CWE-119

Affected Products

Siemens
commercial·DEaka siemens ag
SIMATIC CP 343-1 (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC CP 343-1 ERPC
ICS / OT / IoT
SIMATIC CP 343-1 Lean (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC CP 443-1
ICS / OT / IoT
SIMATIC CP 443-1 Advanced
ICS / OT / IoT
SIPLUS NET CP 443-1
ICS / OT / IoT
SIPLUS NET CP 443-1 Advanced
ICS / OT / IoT
and 6 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-33737?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/pdf/ssa-549234.pdf
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/csaf/ssa-549234.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-549234.html
cert-portal.siemens.com
and 9 more references View all →
News mentions
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