CVE-2023-44317

Q: How do I fix CVE-2023-44317?

1. Download firmware update from Siemens Industrial Security website. 2. Backup device configuration. 3. Apply firmware update via web interface or console. 4. Verify successful update and restore configuration if needed.

Q: What is the severity of CVE-2023-44317?

CVE-2023-44317 has a CVSS score of 7.2 (HIGH). This vulnerability affects multiple Siemens industrial networking devices where improper validation of uploaded X509 certificates could allow attackers with administrative privileges to execute arbitrary code. The flaw impacts various RUGGEDCOM, SCALANCE, and other Siemens router products running outdated firmware versions.

7.2 HIGH

Remote Code Execution

📋 TL;DR

This vulnerability affects multiple Siemens industrial networking devices where improper validation of uploaded X509 certificates could allow attackers with administrative privileges to execute arbitrary code. The flaw impacts various RUGGEDCOM, SCALANCE, and other Siemens router products running outdated firmware versions.

💻 Affected Systems

Products:

RUGGEDCOM RM1224 LTE(4G) EU
RUGGEDCOM RM1224 LTE(4G) NAM
SCALANCE M804PB
SCALANCE M812-1 ADSL-Router
SCALANCE M816-1 ADSL-Router
SCALANCE M826-2 SHDSL-Router
SCALANCE M874-2
SCALANCE M874-3
SCALANCE M876-3
SCALANCE M876-4
SCALANCE MUM853-1
SCALANCE MUM856-1
SCALANCE S615 EEC LAN-Router
SCALANCE S615 LAN-Router
SCALANCE WAB762-1
SCALANCE WAM763-1
SCALANCE WAM766-1
SCALANCE WUB762-1
SCALANCE WUM763-1
SCALANCE WUM766-1

Versions: All versions < V7.2.2 for most products, < V3.0.0 for W-series products

Operating Systems: Embedded firmware

Default Config Vulnerable: ⚠️ Yes

Notes: Requires administrative privileges to exploit. Affects specific hardware models with listed part numbers.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete device compromise allowing remote code execution, potential lateral movement into industrial control networks, and disruption of critical infrastructure operations.

🟠

Likely Case

Privileged attackers gaining persistent access to network devices, enabling traffic interception, network manipulation, and further exploitation of connected systems.

🟢

If Mitigated

Limited impact due to proper network segmentation, strong administrative access controls, and certificate management policies preventing unauthorized certificate uploads.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires administrative access to upload malicious certificates. No public exploits available as of analysis.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: V7.2.2 for most products, V3.0.0 for W-series products

Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-068047.html

Restart Required: Yes

Instructions:

1. Download firmware update from Siemens Industrial Security website. 2. Backup device configuration. 3. Apply firmware update via web interface or console. 4. Verify successful update and restore configuration if needed.

🔧 Temporary Workarounds

Restrict administrative access

all

Limit administrative access to trusted networks and implement strong authentication for administrative interfaces.

Implement certificate management controls

all

Establish strict policies for certificate uploads and validation, including certificate pinning and revocation checking.

🧯 If You Can't Patch

Segment affected devices in isolated network zones with strict firewall rules
Implement network monitoring for certificate upload attempts and unusual administrative activity

🔍 How to Verify

Check if Vulnerable:

Check device firmware version via web interface or CLI. Compare against affected version ranges.

Check Version:

show version (CLI) or check System Information in web interface

Verify Fix Applied:

Confirm firmware version is V7.2.2 or higher (V3.0.0 or higher for W-series) and test certificate upload functionality.

📡 Detection & Monitoring

Log Indicators:

Failed certificate validation attempts
Unusual administrative certificate uploads
System process execution anomalies

Network Indicators:

Unexpected administrative connections to device management interfaces
Certificate upload traffic to affected devices

SIEM Query:

source_ip IN (admin_networks) AND dest_port IN (80,443,22) AND action='certificate_upload' AND device_type IN (affected_models)

📊 Metadata

CVE ID: CVE-2023-44317

CVSS v3 Score: 7.2 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-349

Published: November 14, 2023

Last Updated: January 14, 2025

📋 TL;DR

💻 Affected Systems

📦 What is this software?

Scalance Xb205 3 \(sc\, Pn\) Firmware by Siemens

Scalance Xb205 3 \(st\, E\/ip\) Firmware by Siemens

Scalance Xb205 3 \(st\, Pn\) Firmware by Siemens

Scalance Xb205 3ld \(sc\, E\/ip\) Firmware by Siemens

Scalance Xb205 3ld \(sc\, Pn\) Firmware by Siemens

Scalance Xb208 \(e\/ip\) Firmware by Siemens

Scalance Xb208 \(pn\) Firmware by Siemens

Scalance Xb213 3 \(sc\, E\/ip\) Firmware by Siemens

Scalance Xb213 3 \(sc\, Pn\) Firmware by Siemens

Scalance Xb213 3 \(st\, E\/ip\) Firmware by Siemens

Scalance Xb213 3 \(st\, Pn\) Firmware by Siemens

Scalance Xb213 3ld \(sc\, E\/ip\) Firmware by Siemens

Scalance Xb213 3ld \(sc\, Pn\) Firmware by Siemens

Scalance Xb216 \(e\/ip\) Firmware by Siemens

Scalance Xb216 \(pn\) Firmware by Siemens

Scalance Xc206 2 \(sc\) Firmware by Siemens

Scalance Xc206 2 \(st\/bfoc\) Firmware by Siemens

Scalance Xc206 2g Poe \(54 V Dc\) Firmware by Siemens

Scalance Xc206 2g Poe Eec \(54 V Dc\) Firmware by Siemens

Scalance Xc206 2g Poe Firmware by Siemens

Scalance Xc206 2sfp Eec Firmware by Siemens

Scalance Xc206 2sfp Firmware by Siemens

Scalance Xc206 2sfp G \(eip Def.\) Firmware by Siemens

Scalance Xc206 2sfp G Eec Firmware by Siemens

Scalance Xc206 2sfp G Firmware by Siemens

Scalance Xc208 Firmware by Siemens

Scalance Xc208eec Firmware by Siemens

Scalance Xc208g \(eip Def.\) Firmware by Siemens

Scalance Xc208g Eec Firmware by Siemens

Scalance Xc208g Firmware by Siemens

Scalance Xc208g Poe \(54 V Dc\) Firmware by Siemens

Scalance Xc208g Poe Firmware by Siemens

Scalance Xc216 3g Poe \(54 V Dc\) Firmware by Siemens

Scalance Xc216 3g Poe Firmware by Siemens

Scalance Xc216 4c Firmware by Siemens

Scalance Xc216 4c G \(eip Def.\) Firmware by Siemens

Scalance Xc216 4c G Eec Firmware by Siemens

Scalance Xc216 4c G Firmware by Siemens

Scalance Xc216 Firmware by Siemens

Scalance Xc216eec Firmware by Siemens

Scalance Xc224 4c G \(eip Def.\) Firmware by Siemens

Scalance Xc224 4c G Eec Firmware by Siemens

Scalance Xc224 4c G Firmware by Siemens

Scalance Xc224 Firmware by Siemens

Scalance Xf204 2ba Dna Firmware by Siemens

Scalance Xf204 2ba Firmware by Siemens

Scalance Xf204 Dna Firmware by Siemens

Scalance Xf204 Firmware by Siemens

Scalance Xp208 \(ethernet\/ip\) Firmware by Siemens

Scalance Xp208 Firmware by Siemens

Scalance Xp208eec Firmware by Siemens

Scalance Xp208poe Eec Firmware by Siemens

Scalance Xp216 \(ethernet\/ip\) Firmware by Siemens

Scalance Xp216 Firmware by Siemens

Scalance Xp216eec Firmware by Siemens

Scalance Xp216poe Eec Firmware by Siemens

Scalance Xr324wg \(24 X Fe\, Ac 230v\) Firmware by Siemens

Scalance Xr324wg \(24 X Fe\, Dc 24v\) Firmware by Siemens

Scalance Xr326 2c Poe Wg \(without Ul\) Firmware by Siemens

Scalance Xr326 2c Poe Wg Firmware by Siemens

Scalance Xr328 4c Wg \(24xfe\, 4xge\, 24v\) Firmware by Siemens

Scalance Xr328 4c Wg \(24xfe\, 4xge\,dc24v\) Firmware by Siemens

Scalance Xr328 4c Wg \(24xfe\,4xge\,ac230v\) Firmware by Siemens

Scalance Xr328 4c Wg \(28xge\, Ac 230v\) Firmware by Siemens

Scalance Xr328 4c Wg \(28xge\, Dc 24v\) Firmware by Siemens

Siplus Net Scalance Xc206 2 Firmware by Siemens

Siplus Net Scalance Xc206 2sfp Firmware by Siemens

Siplus Net Scalance Xc208 Firmware by Siemens

Siplus Net Scalance Xc216 4c Firmware by Siemens