Siemens CP, SIMATIC, SIMOCODE, SINAMICS, SITOP, and TIM (Update B)

(I) IoT

5 years ago

1. EXECUTIVE SUMMARY

CVSS v3 7.5
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Siemens
Equipment: CP, SIMATIC, SIMOCODE, SINAMICS, SITOP, and TIM
Vulnerability: Out-of-bounds Read

2. UPDATE INFORMATION

This updated advisory is a follow-up to the updated advisory titled ICSA-19-099-06 Siemens CP, SIMATIC, SIMOCODE, SINAMICS, SITOP, and TIM (Update A) that was published May 14, 2019, on the NCCIC/ICS-CERT website.

3. RISK EVALUATION

Successful exploitation of this vulnerability could result in a denial-of-service condition leading to a restart of the webserver.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following products and versions are affected:

CP1604: All versions
CP1616: All versions
SIMATIC RF185C: All versions
SIMATIC CP343-1 Advanced: All versions
SIMATIC CP443-1: All versions
SIMATIC CP443-1 Advanced: All versions
SIMATIC CP443-1 OPC UA: All versions
SIMATIC ET 200 SP Open Controller CPU 1515SP PC: All versions prior to v2.1.6

——— Begin Update B Part 1 of 2 ———

SIMATIC ET 200 SP Open Controller CPU 1515SP PC2: All versions prior to v2.7
SIMATIC S7-1500 Software Controller: All versions prior to v2.7

——— End Update B Part 1 of 2 ———

SIMATIC HMI Comfort Outdoor Panels 7″ & 15″: All versions
SIMATIC HMI Comfort Panels 4″ – 22″: All versions
SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F: All versions
SIMATIC IPC DiagMonitor: All versions
SIMATIC RF181-EIP: All versions
SIMATIC RF182C: All versions
SIMATIC RF186C: All versions
SIMATIC RF188C: All versions
SIMATIC RF600R: All versions
SIMATIC S7-300 CPU family: All versions prior to v3.X.16
SIMATIC S7-400 PN (incl. F) v6 and below: All versions
SIMATIC S7-400 PN/DP v7 (incl. F): All versions
SIMATIC Teleservice Adapter IE Advanced: All versions
SIMATIC Teleservice Adapter IE Basic: All versions
SIMATIC Teleservice Adapter IE Standard: All versions
SIMATIC WinAC RTX 2010: All versions
SIMATIC WinCC Runtime Advanced: All versions
SIMOCODE pro V EIP: All versions
SIMOCODE pro V PN: All versions
SITOP Manager: All versions
SITOP PSU8600: All versions
SITOP UPS1600: All versions
TIM 1531 IRC: All versions
SIMATIC S7-1500 CPU family: All versions prior to v2.6.1
SIMATIC S7-PLCSIM Advanced: All versions prior to v2.0 SP1 UPD1
SINAMICS G130 v4.6 (Control Unit): All versions prior to v5.2
SINAMICS G130 v4.7 (Control Unit): All versions prior to v5.2
SINAMICS G130 v4.7 SP1 (Control Unit): All versions prior to v5.2
SINAMICS G130 v4.8 (Control Unit): All versions prior to v4.8 HF6
SINAMICS G130 v5.1 (Control Unit): All versions
SINAMICS G130 v5.1 SP1 (Control Unit): All versions prior to v5.1 SP1 HF4
SINAMICS G150 v4.6 (Control Unit): All versions prior to v5.2
SINAMICS G150 v4.7 (Control Unit): All versions
SINAMICS G150 v4.7 SP1 (Control Unit): All versions prior to v5.2
SINAMICS G150 v4.8 (Control Unit): All versions prior to v4.8 HF6
SINAMICS G150 v5.1 (Control Unit): All versions
SINAMICS G150 v5.1 SP1 (Control Unit): All versions prior to v5.1 SP1 HF4
SINAMICS S120 v4.6 (Control Unit): All versions prior to v5.2
SINAMICS S120 v4.7 (Control Unit): All versions
SINAMICS S120 v4.7 SP1 (Control Unit): All versions prior to v5.2
SINAMICS S120 v4.8 (Control Unit): All versions prior to v4.8 HF6
SINAMICS S120 v5.1 (Control Unit): All versions
SINAMICS S120 v5.1 SP1 (Control Unit): All versions prior to v5.1 SP1 HF4
SINAMICS S150 v4.6 (Control Unit): All versions prior to v5.2
SINAMICS S150 v4.7 (Control Unit): All versions
SINAMICS S150 v4.7 SP1 (Control Unit): All versions prior to v5.2
SINAMICS S150 v4.8 (Control Unit): All versions prior to v4.8 HF6
SINAMICS S150 v5.1 (Control Unit): All versions
SINAMICS S150 v5.1 SP1 (Control Unit): All versions prior to v5.1 SP1 HF4
SINAMICS S210 v5.1 (Control Unit): All versions
SINAMICS S210 v5.1 SP1 (Control Unit): All versions

4.2 VULNERABILITY OVERVIEW

4.2.1 OUT-OF-BOUNDS READ CWE-125

The webserver of the affected devices contains a vulnerability that may allow an attacker to cause a denial-of-service condition, which leads to a restart of the webserver.

CVE-2019-6568 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

4.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater Systems
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: Germany

4.4 RESEARCHER

Siemens reported this vulnerability to NCCIC.

5. MITIGATIONS

Siemens recommends upgrading to the following firmware updates for the products below:

v2.1.6 https://support.industry.siemens.com/cs/ww/en/view/109759122

SIMATIC ET 200 SP Open Controller CPU 1515SP PC

——— Begin Update B Part 2 of 2 ——–

v2.7 https://support.industry.siemens.com/cs/ww/en/view/109759122

SIMATIC ET 200 SP Open Controller CPU 1515SP PC2

v2.7 https://support.industry.siemens.com/cs/ww/en/view/109478528

SIMATIC S7-1500 Software Controller

——— End Update B Part 2 of 2 ———-

v2.6.1 https://support.industry.siemens.com/cs/ww/en/view/109478459/

SIMATIC S7-1500 CPU family

v2.0 SP1 UPD1 https://support.industry.siemens.com/cs/de/de/view/109764222

SIMATIC S7-PLCSIM Advanced

v3.X.16 https://support.industry.siemens.com/cs/ww/en/ps/13752/dl

SIMATIC S7-300 CPU family

v5.2 (latest version) https://support.industry.siemens.com/cs/ww/en/view/109764679/

SINAMICS G130 v4.6, v4.7, and v4.7 SP1
SINAMICS G150 v4.6 and v4.7 SP1
SINAMICS S150 v4.6 and v4.7 SP1

v4.8 HF6: https://support.industry.siemens.com/cs/ww/en/view/109742040

SINAMICS G130 v4.8
SINAMICS G150 v4.8
SINAMICS S150 v4.8

v5.1 SP1 HF4 https://support.industry.siemens.com/cs/ww/en/view/109765015

SINAMICS G130 v5.1 SP1
SINAMICS G150 v5.1 SP1
SINAMICS S150 v5.1 SP1

v5.2 (latest version) https://support.industry.siemens.com/cs/ww/en/view/109762626

SINAMICS S120 v4.6 and v4.7 SP1

v4.8 HF6 https://support.industry.siemens.com/cs/ww/en/view/109740193

SINAMICS S120 v4.8

v5.1 SP1 HF4 https://support.industry.siemens.com/cs/ww/en/view/109758423

SINAMICS S120 v5.1 SP1

For all other affected products, Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

Apply appropriate strategies for mitigation as described in the general security recommendation section.
Restrict network access to the integrated webserver.
Deactivate the webserver if not required and if deactivation is supported by the product.
For SINAMICS S, G130, G150 devices: perform upgrade to a new fixed version, for example v5.2.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security (Download) and following the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at:

https://www.siemens.com/industrialsecurity

For more information on the vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-480230 at the following location:

http://www.siemens.com/cert/advisories

NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability.

Source:

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