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AUSCERT External Security Bulletin Redistribution
ESB-2017.0603
Siemens SINUMERIK Integrate and SINUMERIK Operate
8 March 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: SINUMERIK Integrate
SINUMERIK Operate
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Modify Arbitrary Files -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-2685
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-061-03
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Advisory (ICSA-17-061-03)
Siemens SINUMERIK Integrate and SINUMERIK Operate
Original release date: March 02, 2017
Legal Notice
All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the
header. For more information about TLP, see http://www.us-cert.gov/tlp/.
CVSS v3 7.4
ATTENTION: Remotely exploitable.
Vendor: Siemens
Equipment: SINUMERIK Integrate, SINUMERIK Operate
Vulnerability: Man-in-the-Middle
AFFECTED PRODUCTS
Siemens reports that the vulnerability affects the following SINUMERIK
Integrate and Operate product suite versions:
SINUMERIK Integrate Access MyMachine/Ethernet with
AMM Service Engineer Client (ActiveX): All versions.
SINUMERIK Integrate Access MyMachine/Ethernet and Analyze MyCondition with
SINUMERIK Integrate Operate Client:
All versions between 2.0.3.00.016 (including) and 2.0.6 (excluding),
and
All versions between 3.0.4.00.032 (including) and 3.0.6 (excluding).
Affected SINUMERIK Integrate Operate clients are included in the
following Operate releases:
All versions between V4.5 SP6 (including) and V4.5 SP6 Hotfix 8
(excluding), and
All versions between V4.7 SP2 Hotfix 1 (including) and V4.7 SP4
(excluding).
IMPACT
Successful exploitation of this vulnerability could allow attackers in a
privileged network position to capture and modify network traffic protected
with transport layer security.
MITIGATION
Siemens provides the following updates for affected SINUMERIK Integrate
and SINUMERIK Operate versions:
SINUMERIK Integrate Access MyMachine/Ethernet and Analyze MyCondition with
SINUMERIK Operate V4.7:
Update to SINUMERIK Operate V4.7 SP4, or
Update SINUMERIK Integrate Operate Client to V3.0.6
SINUMERIK Operate V4.5:
Update to SINUMERIK Operate V4.5 SP6 Hotfix 8, or
Update SINUMERIK Integrate Operate Client to V2.0.6
SINUMERIK Integrate Access MyMachine/Ethernet with
AMM Service Engineer (ActiveX):
Replace with AMM Service Client V4.1.0.5
Replacement will be automatically installed when connecting to
SINUMERIK Integrate V4.1 SP5 or newer.
These updates can be obtained from a local Siemens service organization. If
assistance is needed in identifying a local Siemens service organization,
users may contact a local Siemens hotline at the following link:
https://w3.siemens.com/aspa_app/
As a general security measure Siemens strongly recommends users configure
their environment according to Siemens operational guidelines found below:
https://www.industry.siemens.com/topics/global/en/industrial-security/Documents/operational_guidelines_industrial_security_en.pdf
For more information on this vulnerability and more detailed mitigation
instructions, please see Siemens Security Advisory SSA-934525 at the
following location:
http://www.siemens.com/cert/en/cert-security-advisories.htm
NCCIC/ICS-CERT recommends that 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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 ICS‑CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. High
skill level is needed to exploit.
VULNERABILITY OVERVIEW
MAN-IN-THE-MIDDLE CWE-300
A channel accessible by non-endpoint ("man-in-the-middle") vulnerability
has been identified. This could allow an unverified attacker to eavesdrop,
capture, or modify communications.
CVE-2017-2685 has been assigned to this vulnerability. A CVSS v3
base score of 7.4 has been assigned; the CVSS vector string is
(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
BACKGROUND
Critical Infrastructure Sector(s): Energy, Healthcare and Public Health,
and Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov
ICS-CERT continuously strives to improve its products and services. You
can help by choosing one of the links below to provide feedback about
this product.
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