Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.1588
Siemens XHQ
23 June 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens XHQ
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6866
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-173-02
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-17-173-02)
Siemens XHQ
Original release date: June 22, 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 6.5
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Siemens
Equipment: XHQ
Vulnerability: Improper Access Control
AFFECTED PRODUCTS
Siemens reports that the vulnerability affects the following versions of
the XHQ operations intelligence product line:
XHQ 4: All versions prior to V4.7.1.3
XHQ 5: All versions prior to V5.0.0.2
IMPACT
This vulnerability could allow a low-privileged remote user to gain read
access to data in the XHQ solution exceeding his configured permission level.
MITIGATION
Siemens has released new versions of XHQ to address this vulnerability.
Users are to call their local service organization for further information on
how to obtain the newest version of XHQ. If the local service organization
is not known, please call a local Siemens hotline center:
https://w3.siemens.com/aspa_app/
Siemens strongly recommends users protect network access to XHQ 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
For more information on this vulnerability and more detailed mitigation
instructions, please see Siemens Security Advisory SSA-945660 at the
following location:
http://www.siemens.com/cert/advisories
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:
Restrict access to systems to only those users who require access
that system.
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. This
vulnerability is remotely exploitable. Low skill level is needed to exploit.
VULNERABILITY OVERVIEW
IMPROPER ACCESS CONTROL CWE-284
A vulnerability in XHQ server could allow an authenticated, low-privileged
remote user to gain read access to data in the XHQ solution exceeding his
configured permission level.
CVE-2017-6866 has been assigned to this vulnerability. A CVSS v3
base score of 6.5 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
RESEARCHER
Siemens self-reported this vulnerability.
BACKGROUND
Critical Infrastructure Sector: Energy
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
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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=Wot1
-----END PGP SIGNATURE-----