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Simatic Cp 443 1 FirmwareOperating system · Siemens

CVE-2015-8214

HIGH · 9.7 CVSS v2.0 Published 2015-11-27
Fix available
A fix is available. Upgrade to after 3.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability has been identified in SIMATIC NET CP 342-5 (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions < V3.0.44), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions < V3.1.1), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions < V3.1.1), SIMATIC NET CP 443-1 Advanced (incl. SIPLUS variants) (All versions < V3.2.9), SIMATIC NET CP 443-1 Standard (incl. SIPLUS variants) (All versions < V3.2.9), SIMATIC NET CP 443-5 Basic (incl. SIPLUS variants) (All versions), SIMATIC NET CP 443-5 Extended (All versions), TIM 3V-IE / TIM 3V-IE Advanced (incl. SIPLUS NET variants) (All versions < V2.6.0), TIM 3V-IE DNP3 (incl. SIPLUS NET variants) (All versions < V3.1.0), TIM 4R-IE (incl. SIPLUS NET variants) (All versions < V2.6.0), TIM 4R-IE DNP3 (incl. SIPLUS NET variants) (All versions < V3.1.0). The implemented access protection level enforcement of the affected communication processors (CP) could possibly allow unauthenticated users to perform administrative operations on the CPs if network access (port 102/TCP) is available and the CPs' configuration was stored on their corresponding CPUs.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is an authentication bypass vulnerability in Siemens SIMATIC NET communication processors (CP 342-5, CP 343-1 variants, CP 443-1 variants, CP 443-5, and TIM devices). The access protection level enforcement fails to properly authenticate users, allowing unauthenticated attackers to perform administrative operations via port 102/TCP when the CP configuration is stored on the corresponding CPU.

MitigationApply vendor-supplied firmware updates to all affected CP devices (specific version thresholds vary by model: CP 343-1 needs V3.0.44/V3.1.1, CP 443-1 needs V3.2.9, TIM variants need V2.6.0/V3.1.0). Where patches are unavailable, restrict network access to port 102/TCP via firewalls/VLANs and avoid storing CP configurations on CPUs.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Simatic Cp 443 1 FirmwareOperating system
Affected:all versions
Simatic Tim 4r Ie FirmwareOperating system
Affected:all versions
Simatic Cp 343 1 FirmwareOperating system
Affected:all versions<= 3.0
Simatic Tim 3v Ie FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:N/C:P/I:C/A:C

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the SIMATIC device model
    Access the device via SIMATIC Manager or industrial management software and retrieve the exact model number (CP 342-5, CP 343-1, CP 443-1, CP 443-5, TIM 3v IE, or TIM 4r IE)
    Affected if The model is one of: CP 343-1, CP 443-1, TIM 3v IE, or TIM 4r IE (CP 342-5 and CP 443-5 are also listed in the summary but have no version range specified)
  2. Determine the firmware version
    Use SIMATIC Manager, STEP 7, or the device web interface to query the firmware version installed on the communication processor
    Affected if The firmware version is all versions for CP 443-1 and TIM variants, or version 3.0 or lower for CP 343-1
  3. Verify port 102/TCP accessibility
    Perform a network port scan targeting the device on TCP port 102 (using nmap -p 102 <device_ip> or similar) to determine if the port is exposed to network segments accessible to attackers
    Affected if Port 102/TCP is open and accessible from untrusted network segments
  4. Check if CP configuration is stored on the CPU
    Review the PLC/CPU configuration in STEP 7 or SIMATIC Manager to determine whether the CP (Communication Processor) configuration is stored on the CPU rather than on the CP itself
    Affected if The CP configuration is stored on the CPU (this is the specific condition that enables the vulnerability)
  5. Assess network isolation
    Review firewall rules, VLAN configurations, and network segmentation to determine if the device and port 102 are protected from untrusted network access
    Affected if No firewall or VLAN isolation exists between the device and untrusted networks, or port 102 is directly accessible from outside

The environment is affected if a CP 343-1 (firmware <=3.0), CP 443-1, TIM 3v IE, or TIM 4r IE device has port 102/TCP exposed and stores its CP configuration on the CPU, allowing unauthenticated administrative access.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 3.0
Interim mitigation

Apply vendor-supplied firmware updates to all affected CP devices (specific version thresholds vary by model: CP 343-1 needs V3.0.44/V3.1.1, CP 443-1 needs V3.2.9, TIM variants need V2.6.0/V3.1.0). Where patches are unavailable, restrict network access to port 102/TCP via firewalls/VLANs and avoid storing CP configurations on CPUs.

Recommended fix High confidence

CP 343-1 Advanced: V3.0.44+; CP 343-1 Lean/Standard: V3.1.1+; CP 443-1 Advanced/Standard: V3.2.9+; TIM 3V-IE/TIM 4R-IE: V2.6.0+; TIM 3V-IE DNP3/TIM 4R-IE DNP3: V3.1.0+

  1. 1. Identify the specific CP model (e.g., CP 343-1, CP 443-1, TIM 3V-IE, TIM 4R-IE) from your Siemens equipment.
  2. 2. Access the Siemens Industry Online Support portal at support.industry.siemens.com or cert-portal.siemens.com to locate the appropriate firmware update.
  3. 3. Download the fixed firmware version for your specific CP model: CP 343-1 Advanced upgrade to V3.0.44 or later; CP 343-1 Lean/Standard upgrade to V3.1.1 or later; CP 443-1 Advanced/Standard upgrade to V3.2.9 or later; TIM 3V-IE/TIM 4R-IE upgrade to V2.6.0 or later; TIM 3V-IE DNP3/TIM 4R-IE DNP3 upgrade to V3.1.0 or later.
  4. 4. Review the firmware update documentation for any prerequisites or installation procedures.
  5. 5. Back up the current CP configuration before applying the update.
  6. 6. Apply the firmware update via Siemens STEP 7/TIA Portal or the CP's web-based configuration interface.
  7. 7. After updating, verify that the access protection is properly configured and that port 102 access is restricted to authorized hosts only.
  8. 8. Consider network segmentation to isolate industrial control system devices from untrusted networks as an additional mitigation.
Caveat Firmware updates on industrial control devices may require retesting of control logic and could affect communication with upstream systems; verify compatibility with your PLC/Scada configuration before deploying to production

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Simatic Cp 443 1 Firmware Scoped from the published advisory
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  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

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