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AUSCERT External Security Bulletin Redistribution
ESB-2017.1932.2
Siemens Molecular Imaging Vulnerabilities
4 August 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens Molecular Imaging
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-7861 CVE-2015-7860 CVE-2015-1635
CVE-2015-1497
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSMA-17-215-02
Comment: Exploits that target these vulnerabilities are known to be publicly
available.
Revision History: August 4 2017: Added CVEs to header information
August 4 2017: Initial Release
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Advisory (ICSMA-17-215-02)
Siemens Molecular Imaging Vulnerabilities
Original release date: August 03, 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/.
OVERVIEW
Siemens has identified four vulnerabilities in Siemens' Molecular
Imaging products running on Windows 7. Siemens is preparing updates for
the affected products.
These vulnerabilities could be exploited remotely. Exploits that target
these vulnerabilities are known to be publicly available.
AFFECTED PRODUCTS
Siemens reports that the vulnerabilities affect the following products:
Siemens PET/CT Systems: All Windows 7-based versions,
Siemens SPECT/CT Systems: All Windows 7-based versions,
Siemens SPECT Systems: All Windows 7-based versions, and
Siemens SPECT Workplaces/Symbia.net: All Windows 7-based versions.
IMPACT
Successful exploitation of these vulnerabilities may allow the attacker
to remotely execute arbitrary code.
Impact to individual organizations depends on many factors that are unique
to each organization. NCCIC/ICS-CERT recommends that organizations evaluate
the impact of these vulnerabilities based on their operational environment
and specific clinical usage.
BACKGROUND
Siemens is an international company headquartered in Munich, Germany.
The affected products, Select Molecular Imaging products, are used in
medical imaging. According to Siemens, Molecular Imaging products are
deployed across the Healthcare and Public Health sector. Siemens estimates
that these products are used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
IMPROPER CONTROL OF GENERATION OF CODE ('CODE INJECTION') [a]
An unauthenticated remote attacker could execute arbitrary code by sending
specially crafted HTTP requests to the Microsoft web server (Port 80/TCP
and Port 443/TCP) of affected devices.
CVE-2015-1635[b] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[c]
IMPROPER CONTROL OF GENERATION OF CODE ('CODE INJECTION')[d]
An unauthenticated remote attacker could execute arbitrary code by sending
a specially crafted request to the HP Client automation service on Port
3465/TCP of affected devices.
CVE-2015-1497[e] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[f]
IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER[g]
An unauthenticated remote attacker could execute arbitrary code by sending
a specially crafted request to the HP Client automation service of affected
devices.
CVE-2015-7860[h] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[i]
PERMISSIONS, PRIVILEGES, AND ACCESS CONTROLS[j]
An unauthenticated remote attacker could execute arbitrary code by sending
a specially crafted request to the HP Client automation service of affected
devices.
CVE-2015-7861[k] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[l]
VULNERABILITY DETAILS
EXPLOITABILITY
These vulnerabilities could be exploited remotely.
EXISTENCE OF EXPLOIT
Exploits that target these vulnerabilities are publicly available.
DIFFICULTY
An attacker with a low skill would be able to exploit these vulnerabilities.
MITIGATION
Siemens is preparing updates for the affected products and recommends
protecting network access to the Molecular Imaging products with appropriate
mechanisms. It is advised to run the devices in a dedicated network segment
and protected IT environment. If this is not possible, Siemens recommends
the following:
If patient safety and treatment is not at risk, disconnect the product
from the network and use in standalone mode.
Reconnect the product only after the provided patch or remediation is
installed on the system. Siemens is able to patch systems capable of
Remote Update Handling (RUH) much faster by remote software distribution
compared to onsite visits. Therefore users of RUH-capable equipment
are recommended to clarify the situation concerning patch availability
and remaining risk in the local customer network with the Siemens
Customer Care Center first and then to reconnect the systems in order
to receive patches as quickly as possible via RUH. This ensures smooth
and fast receipt of updates and therefore supports reestablishment of
system operations.
In addition, Siemens recommends:
Ensure users have appropriate backups and system restoration procedures.
For specific patch and remediation guidance information contact a local
Siemens customer service engineer or a Siemens regional support center.
For more information on these vulnerabilities and more detailed mitigation
instructions, please see Siemens Security Advisory SSA-814457 at the
following location:
http://www.siemens.com/cert/advisories
ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:
Minimize network exposure for all medical devices and/or systems,
and ensure that they are not accessible from the Internet.
Locate all medical devices 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 also provides a section for security
recommended practices on the ICS-CERT web page at
http://ics-cert.us-cert.gov/content/recommended-practices. ICS-CERT reminds
organizations to perform proper impact analysis and risk assessment prior
to deploying defensive measures.
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
(http://ics-cert.us-cert.gov/).
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.
a.
CWE-94: Improper Control of Generation of Code ('Code Injection'),
https://cwe.mitre.org/data/definitions/94.html, web site last accessed
August 03, 2017.
b.
NVD, https://nvd.nist.gov/vuln/detail/CVE-2015-1635, NIST uses this
advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
c.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed August 03, 2017.
d.
CWE-94: Improper Control of Generation of Code ('Code Injection'),
https://cwe.mitre.org/data/definitions/94.html, web site last accessed
August 03, 2017.
e.
NVD, https://nvd.nist.gov/vuln/detail/CVE-2015-1497, NIST uses this
advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
f.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed August 03, 2017.
g.
CWE-119: Improper Restriction of Operations within the Bounds of a
Memory Buffer, https://cwe.mitre.org/data/definitions/119.html, web
site last accessed August 03, 2017.
h.
NVD, https://nvd.nist.gov/vuln/detail/CVE-2015-7860, NIST uses this
advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
i.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed August 03, 2017.
j.
CWE-264: Permissions, Privileges, and Access Controls,
https://cwe.mitre.org/data/definitions/264.html, web site last accessed
August 03, 2017.
k.
NVD, https://nvd.nist.gov/vuln/detail/CVE-2015-7861, NIST uses this
advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
l.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed August 03, 2017.
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.
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