ESB-2017.1646.2 - UPDATE [Appliance] Siemens Products: Root compromise - Remote/unauthenticated 2017-07-13

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.1646.2
         Advisory (ICSA-17-180-01) Siemens SIMATIC Industrial PCs,
              SINUMERIK Panel Control Unit, and SIMOTION P320
                               13 July 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Siemens SIMATIC Industrial PCs
                   SINUMERIK Panel Control Unit
                   SIMOTION P320
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Root Compromise -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5689  

Reference:         ASB-2017.0063
                   ESB-2017.1357

Original Bulletin: 
   http://ics-cert.us-cert.gov/advisories/ICSA-17-180-01

Revision History:  July 13 2017: Siemens has provided firmware updates
                   June 30 2017: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

Advisory (ICSA-17-180-01A)

Siemens SIMATIC Industrial PCs, SINUMERIK Panel Control Unit, and SIMOTION 
P320 (Update A)

Original release date: June 29, 2017 | Last revised: July 11, 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 9.8

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Siemens

Equipment: SIMATIC Industrial PCs, SINUMERIK Panel Control Unit (PCU), 
SIMOTION P320

Vulnerability: Permissions, Privileges, and Access Controls

UPDATED INFORMATION

This updated advisory is a follow-up to the original advisory titled 
ICSA-17-180-01 Siemens Industrial Products using Intel Processors that was 
published June 29, 2017, on the NCCIC/ICS-CERT web site.

AFFECTED PRODUCTS

Siemens reports that the vulnerability affects Siemens Industrial products 
which use Intel processors (Intel Core i5, Intel Core i7 and Intel XEON):

SIMATIC Industrial PCs

SINUMERIK Panel Control Unit (PCU)

SIMOTION P320

Please see Siemens Security Advisory SSA-874235 (link is external) for the 
full list of affected versions.

IMPACT

A remote attacker can gain system privileges by exploiting this vulnerability.

MITIGATION

- --------- Begin Update A Part 1 of 1 --------

Siemens has provided firmware updates for the affected industrial PCs to 
address this vulnerability. These updates can be found on their web site at 
the following location:

https://support.industry.siemens.com/cs/ww/en/view/109747626 (link is 
external)

- --------- End Update A Part 1 of 1 ----------

Siemens strongly recommends users protect network access to the non-perimeter
industrial products with appropriate mechanisms. Siemens also advises that 
users configure the operational environment according to Siemens' Operational
Guidelines for Industrial Security:

https://www.siemens.com/cert/operational-guidelines-industrial-security (link
is external)

For more a specific list of affected products and more detailed mitigation 
instructions, please see Siemens Security Advisory SSA-874235 at the following
location:

http://www.siemens.com/cert/advisories (link is external)

For more information about this vulnerability, please see Intel Security 
Advisory - INTEL-SA-00075 at the following location:

https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA- (link is 
external)00075&languageid=en-fr

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.

VULNERABILITY OVERVIEW

PERMISSIONS, PRIVILEGES, AND ACCESS CONTROLS CWE-264

Unprivileged local or remote attackers can gain system privileges to 
provisioned Intel manageability SKUs: Intel Active Management Technology 
(AMT), Intel Standard Manageability (ISM) and Intel Small Business Technology
(SBT).

CVE-2017-5689 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

RESEARCHER

Maksim Malyutin from Embedi reported this issue to Intel.

BACKGROUND

Critical Infrastructure Sectors: Chemical, Commercial Facilities, Critical 
Manufacturing, Energy, Food and Agriculture, Water and Wastewater 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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=H6ZF
-----END PGP SIGNATURE-----

« Back to bulletins