ESB-2017.1932.2 - UPDATED ALERT [Win] Siemens Molecular Imaging: Execute arbitrary code/commands - Remote/unauthenticated 2017-08-04

Printable version
PGP/GPG verifiable version

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

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

                              ESB-2017.1932.2
                 Siemens Molecular Imaging Vulnerabilities
                               4 August 2017

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

        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

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

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.

- --------------------------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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=y9qC
-----END PGP SIGNATURE-----

« Back to bulletins