Siemens SIMATIC, SIMOTION, and SINUMERIK
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CVSS v3 8.2
ATTENTION: Remotely exploitable/low skill level to exploit.
Equipment: SIMATIC, SIMOTION, and SINUMERIK
Vulnerabilities: Stack-based Buffer Overflow; and Permissions, Privileges, and Access Controls
Siemens reports that the vulnerabilities affect the following Industrial PCs and BIOS versions:
- SIMATIC Field-PG M3: ME prior to V126.96.36.19935,
- SIMATIC Field-PG M4: BIOS prior to V18.01.06,
- SIMATIC Field-PG M5: BIOS prior to V22.01.04,
- SIMATIC HMI IPC677C: ME prior to V188.8.131.5235,
- SIMATIC IPC427D: BIOS prior to V17.0?.10,
- SIMATIC IPC427E: BIOS prior to V21.01.07,
- SIMATIC IPC477D: BIOS prior to V17.0?.10,
- SIMATIC IPC477D PRO: BIOS prior to V17.0?.10,
- SIMATIC IPC477E: BIOS prior to V21.01.07,
- SIMATIC IPC547D: ME prior to V184.108.40.20672,
- SIMATIC IPC547E: ME prior to V220.127.116.1124,
- SIMATIC IPC547G: ME prior to V18.104.22.16825 and BIOS < R1.21.0,
- SIMATIC IPC627C: ME prior to V22.214.171.12435,
- SIMATIC IPC627D: ME prior to V126.96.36.19924,
- SIMATIC IPC647C: ME prior to V188.8.131.5235,
- SIMATIC IPC647D: ME prior to V184.108.40.20624,
- SIMATIC IPC677D: ME prior to V220.127.116.1124,
- SIMATIC IPC827C: ME prior to V18.104.22.16835,
- SIMATIC IPC827D: ME prior to V22.214.171.12424,
- SIMATIC IPC847C: ME prior to V126.96.36.19935,
- SIMATIC IPC847D: ME prior to V188.8.131.5224,
- SIMATIC ITP1000: BIOS prior to V23.01.03,
- SINUMERIK PCU50.5-C, WIN7: ME prior to V184.108.40.20635,
- SINUMERIK PCU50.5-C, WINXP: ME prior to V220.127.116.1135,
- SINUMERIK PCU50.5-P, WIN7: ME prior to V18.104.22.16835,
- SINUMERIK PCU50.5-P, WINXP: ME prior to V22.214.171.12435, and
- SIMOTION P320-4S: BIOS < S17.02.06.83.1
Successful exploitation of these vulnerabilities could result in execution of arbitrary code, extended privileges, and unauthenticated access to sensitive data.
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to run the devices in a protected IT environment, Siemens particularly recommends users configure the environment according to Siemens’ Operational Guidelines for Industrial Security, and follow the recommendations in the product manuals. The Operational Guidelines for Industrial Security can be found at:
Additional information on Industrial Security by Siemens can be found at:
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
- The attacker must have network access for CVE-2017-5712 and local access for all other vulnerabilities. Siemens recommends operating the devices only within trusted networks.
For more information on these vulnerabilities and associated software updates, please see Siemens security notification SSA-892715 on their website:
NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 in the NCCIC Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT website.
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.
In addition, NCCIC recommends that users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open unsolicited attachments in email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
Multiple buffer overflows could allow attackers to execute arbitrary code. Local access to the system is required to exploit this vulnerability.
CVE-2017-5705, CVE-2017-5706, and CVE-2017-5707 have been assigned to these vulnerabilities. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
A buffer overflow could allow remote authenticated attackers to execute arbitrary code with extended privileges.
Multiple buffer overflows could allow attackers with local access to execute arbitrary code.
Multiple privilege escalations could allow unauthenticated access to sensitive data.
CVE-2017-5708, CVE-2017-5709, and CVE-2017-5710 have been assigned to these vulnerabilities. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N).
Siemens ProductCERT reported the vulnerabilities to NCCIC.
Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater Systems.
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
For any questions related to this report, please contact the NCCIC at:
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