Simatic S7 1500 Et 200Pro CVE-2023-46156

HIGH

Use After Free (CWE-416)

2023-12-12 productcert@siemens.com

Denial Of Service Use After Free Memory Corruption Siemens Simatic S7 1500 Et 200Pro Simatic S7 1500 Software Controller Firmware Simatic S7 1500 Cpu 1511 1 Pn Firmware Simatic S7 1500 Cpu 1513 1 Pn Firmware Simatic S7 1500 Cpu 1515 2 Pn Firmware Simatic S7 1500 Cpu 1516 3 Pn Dp Firmware Simatic S7 1500 Cpu 1517 3 Pn Dp Firmware Simatic S7 1500 Cpu 1518 4 Pn Dp Firmware Simatic S7 1500 Cpu 1511F 1 Pn Firmware Simatic S7 1500 Cpu 1513F 1 Pn Firmware Simatic S7 1500 Cpu 1515F 2 Pn Firmware Simatic S7 1500 Cpu 1516F 3 Pn Dp Firmware Simatic S7 1500 Cpu 1517F 3 Pn Dp Firmware Simatic S7 1500 Cpu 1518F 4 Pn Dp Firmware Sinumerik One Firmware Simatic S7 Plcsim Advanced Firmware Sinumerik Mc Firmware Simatic Drive Controller Cpu 1504D Tf Firmware Simatic Drive Controller Cpu 1507D Tf Firmware Simatic S7 1500 Cpu 1510Sp F 1 Pn Firmware Simatic S7 1500 Cpu 1510Sp 1 Pn Firmware Simatic S7 1500 Cpu 1511C 1 Pn Firmware Simatic S7 1500 Cpu 1511T 1 Pn Firmware Simatic S7 1500 Cpu 1511Tf 1 Pn Firmware Simatic S7 1500 Cpu 1512C 1 Pn Firmware Simatic S7 1500 Cpu 1512Sp F 1 Pn Firmware Simatic S7 1500 Cpu 1512Sp 1 Pn Firmware Simatic S7 1500 Cpu 1513R 1 Pn Firmware Simatic S7 1500 Cpu 1515R 2 Pn Firmware Simatic S7 1500 Cpu 1515T 2 Pn Firmware Simatic S7 1500 Cpu 1515Tf 2 Pn Firmware Simatic S7 1500 Cpu 1516T 3 Pn Dp Firmware Simatic S7 1500 Cpu 1517H 3 Pn Firmware Simatic S7 1500 Cpu 1517T 3 Pn Dp Firmware Simatic S7 1500 Cpu 1517Tf 3 Pn Dp Firmware Simatic S7 1500 Cpu 1518Hf 4 Pn Firmware Simatic S7 1500 Cpu 1518T 4 Pn Dp Firmware Simatic S7 1500 Cpu 1518Tf 4 Pn Dp Firmware Simatic S7 1500 Cpu S7 1518 4 Pn Dp Odk Firmware Simatic S7 1500 Cpu S7 1518F 4 Pn Dp Odk Firmware Siplus Et 200Sp Cpu 1510Sp F 1 Pn Firmware Siplus Et 200Sp Cpu 1510Sp F 1 Pn Rail Firmware Siplus Et 200Sp Cpu 1510Sp 1 Pn Firmware Siplus Et 200Sp Cpu 1510Sp 1 Pn Rail Firmware Siplus Et 200Sp Cpu 1512Sp F 1 Pn Rail Firmware Siplus Et 200Sp Cpu 1512Sp 1 Pn Firmware Siplus Et 200Sp Cpu 1512Sp 1 Pn Rail Firmware Siplus S7 1500 Cpu 1511 1 Pn Firmware Siplus S7 1500 Cpu 1511 1 Pn T1 Rail Firmware Siplus S7 1500 Cpu 1511 1 Pn Tx Rail Firmware Siplus S7 1500 Cpu 1511F 1 Pn Firmware Siplus S7 1500 Cpu 1513 1 Pn Firmware Siplus S7 1500 Cpu 1513F 1 Pn Firmware Siplus S7 1500 Cpu 1515F 2 Pn Firmware Siplus S7 1500 Cpu 1515F 2 Pn Rail Firmware Siplus S7 1500 Cpu 1515F 2 Pn T2 Rail Firmware Siplus S7 1500 Cpu 1515R 2 Pn Firmware Siplus S7 1500 Cpu 1515R 2 Pn Tx Rail Firmware Siplus S7 1500 Cpu 1516 3 Pn Dp Firmware Siplus S7 1500 Cpu 1516 3 Pn Dp Tx Rail Firmware Siplus S7 1500 Cpu 1516F 3 Pn Dp Firmware Siplus S7 1500 Cpu 1516F 3 Pn Dp Rail Firmware Siplus S7 1500 Cpu 1517H 3 Pn Firmware Siplus S7 1500 Cpu 1518 4 Pn Dp Firmware Siplus S7 1500 Cpu 1518 4 Pn Dp Mfp Firmware Siplus S7 1500 Cpu 1518F 4 Pn Dp Firmware Simatic S7 1500 Cpu 1514Sp 2 Pn Firmware Simatic S7 1500 Cpu 1514Sp F 2 Pn Firmware Simatic S7 1500 Cpu 1514Spt 2 Pn Firmware Simatic S7 1500 Cpu 1514Spt F 2 Pn Firmware Siplus S7 1500 Cpu 1518Hf 4 Pn Firmware Simatic Et 200Sp Open Control 1515Sp Pc2 Firmware Siplus Et 200Sp 1512Sp F 1 Pn Firmware

7.5

CVSS 3.1 · Vendor: siemens

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Vulnerability Assessment

Weakness	CWE CWE-416 ASVS 5.0 V15 - Secure Coding and Architecture Memory lifecycle management MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	A remote attacker could access freed memory to execute arbitrary code or crash the application by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 1.2% exploitation probability (EPSS)

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AnalysisAI

Affected devices improperly handle specially crafted packets sent to port 102/tcp. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition. A restart is needed to restore normal operations. Affected products include: Siemens Simatic Drive Controller Cpu 1504D Tf Firmware, Siemens Simatic Drive Controller Cpu 1507D Tf Firmware, Siemens Simatic Et 200Sp Open Control 1515Sp Pc2 Firmware, Siemens Simatic S7-1500 Cpu 1510Sp F-1 Pn Firmware, Siemens Simatic S7-1500 Cpu 1510Sp-1 Pn Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (siemens) PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from Vendor (siemens) · only source for this CVE.

CVSS VectorVendor: siemens

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionCVE.org

Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition. A restart is needed to restore normal operations.

Threat Intelligence Overview

EPSS Score

1.2%

Top 34% exploitable

Data Quality

2 sources

Confidence: Low

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 1.2%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

39

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Use After Free HIGH

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:siemens:simatic_drive_controller_cpu_1504d_tf_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_drive_controller_cpu_1507d_tf_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_et_200sp_open_control_1515sp_pc2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1510sp_f-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1510sp-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511c-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511f-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511t-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511tf-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1512c-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1512sp_f-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1512sp-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1513-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1513f-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1513r-1_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1514sp_f-2_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1514sp-2_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1514spt_f-2_pn_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_s7-1500_cpu_1514spt-2_pn_firmware:*:*:*:*:*:*:*:*

+ 56 more

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References

Advisories & patches

ADVISORY https://cert-portal.siemens.com/productcert/pdf/ssa-280603.pdf ADVISORY https://cert-portal.siemens.com/productcert/pdf/ssa-592380.pdf REF https://cert-portal.siemens.com/productcert/html/ssa-280603.html REF https://cert-portal.siemens.com/productcert/html/ssa-592380.html

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