-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

                               ESB-2014.2280
                  Emerson ROC800 Multiple Vulnerabilities
                              3 December 2014

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

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

Product:           Emerson Process Management RTU
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Root Compromise                 -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Create Arbitrary Files          -- Remote/Unauthenticated
                   Reduced Security                -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-2810 CVE-2013-0694 CVE-2013-0693
                   CVE-2013-0692 CVE-2013-0689 

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-13-259-01A

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

Advisory (ICSA-13-259-01A)

Emerson ROC800 Multiple Vulnerabilities (Update A)

Original release date: December 02, 2014

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

This updated advisory is a follow-up to the original advisory titled
ICSA-13-259-01 Emerson ROC800 Multiple Vulnerabilities that was published
September 26, 2013, on the NCCIC/ICS-CERT web site.

This advisory provides mitigation details for multiple vulnerabilities
affecting the Emerson Process Management's ROC800 remote terminal units
(RTUs) products (ROC800, ROC800L, and DL8000).

- --------- Begin Update A Part 1 of 3 --------
Researchers Dillon Beresford, Brian Meixell, Marc Ayala, and Eric Forner,
formally of Cimation, have identified multiple vulnerabilities in Emerson
Process Management's ROC800 RTU products. Emerson Process Management has
produced a patch that mitigates these vulnerabilities. The researchers
have tested the patch to validate that it resolves the vulnerabilities
being patched.
- --------- End Update A Part 1 of 3 ----------
These vulnerabilities can be exploited remotely.

AFFECTED PRODUCTS

The following Emerson Process Management RTUs are affected:

    ROC800 Version 3.50 and prior,
    DL8000 Version 2.30 and prior, and
    ROC800L Version 1.20 and prior.

IMPACT

An attacker who exploits these vulnerabilities could disable the device,
compromise the device integrity, and remotely execute code on the target
system.

Impact to individual organizations depends on many factors that are unique
to each organization. ICS-CERT recommends that organizations evaluate the
impact of these vulnerabilities based on their operational environment,
architecture, and product implementation.

BACKGROUND

Emerson Process Management is a global manufacturing and technology company
offering multiple products and services in the industrial, commercial, and
consumer markets through its network power, process management, industrial
automation, climate technologies, and tools and storage businesses.

The affected product, the ROC800 RTU, can perform many PLC-like functions
for controlling devices. It is widely used in oil and gas pipelines, but can
also be used as a general purpose controller in other applications. Emerson
Process Management estimates that these products are used primarily in
the United States and Europe with a small percentage in Asia.

VULNERAVILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

HIDDEN FUNCTIONALITY[a]

In the case of the ROC800 RTU, there are three separate hidden functionality
vulnerabilities that are described below. Each of these hidden capabilities
increases the attack surface for the device and can be exploited by an
attacker.

OSE DEBUG BROADCAST

The ROC800 RTU runs the ENEA OSE operating system. The kernel running on
the ROC800 device broadcasts a network beacon allowing easier detection of
the OSE Debug vulnerability. This vulnerability could be exploited remotely.

CVE-2013-0693[b] has been assigned to this vulnerability. A CVSS
v2 base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C[c]

OSE DEBUG SERVICE

The ROC800 RTU kernel has a port available for attaching a debug tool. A
device with a running debug service allows debuggers to attach and remotely
debug code on the device and is intended to be enabled, only on development
systems and never on a production device. An attacker can remotely attach to
the device and alter memory, registers, process states, and ultimately have
full control of the device. This vulnerability could be exploited remotely.

CVE-2013-0692[d] has been assigned to this vulnerability. A CVSS
v2 base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C).[e]

TFTP SERVER

A TFTP server is available on the ROC800 RTU. A TFTP service is used
for transferring files to a network attached device. The issue with the
existence of this service is that arbitrary files can potentially be
uploaded. This vulnerability could be exploited remotely.

CVE-2013-0689 [f] has been assigned to this vulnerability. A CVSS
v2 base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C).[g]

USE OF HARD-CODED CREDENTIALS[h]

Hard-coded accounts with passwords have been discovered in the ROC800
ROM. An attacker could have access to the operating system command shell
and/or obtain authentication information for all ROC800 devices. These
vulnerabilities could be exploited remotely.

CVE-2013-0694[i] has been assigned to this vulnerability. A CVSS
v2 base score of 9.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:S/C:C/I:C/A:C).[j]

- --------- Begin Update A Part 2 of 3 --------

AUTHENTICATION BYPASS BY CAPTURE REPLAY[k]

A TCP replay attack could be executed on the ROC800 causing it to execute
commands that are not intended by the user.

CVE-2013-2810[l] has been assigned to this vulnerability. A CVSS
v2 base score of 10.0 has been assigned; the CVSS vector string is
(AV:N/AC:L/Au:N/C:C/I:C/A:C).[m]

- --------- End Update A Part 2 of 3 ----------

VULNERABILITY DETAILS

EXPLOITABILITY

All the vulnerabilities described in this advisory are remotely exploitable
and can be used by an attacker to compromise the ROC800 device to varying
degrees, including several that can result in the complete compromise of
the device.

EXISTENCE OF EXPLOIT

No known public exploits specifically target these vulnerabilities.

DIFFICULTY

An attacker with a low skill would be able to exploit these vulnerabilities.

MITIGATION

The best mitigation for these vulnerabilities is to install the vendor
patch. The Emerson Process Management patch is available via the following
web link of which a user name and password is required:

http://www3.emersonprocess.com/remote/support/support_login.html

- --------- Begin Update A Part 3 of 3 --------

Emerson has identified and verified that a third-party secure router,
the Moxa EDR-810, mitigates the identified vulnerabilities when used in
combination with the ROC800 platform. Emerson asserts that by adding the
EDR-810 between the host and the field device it is virtually impossible
for an attacker to eavesdrop on communications or falsify commands.

The EDR-810 is a highly integrated industrial multiport secure router with
Firewall/NAT/VPN. The compatibility of the EDR-810 with the ROC800 platform
has been tested and verified by Emerson Remote Automation Solutions. Emerson
has determined that the EDR-810 is suitable for field installation. The
EDR-810 uses IPSec server or client mode for encryption and authentication
of all IP packets at the network layer to ensure confidentiality and
sender authentication.

Additional information about the Moxa EDR-810 secure router is available
at the following location:

http://www.moxa.com/product/EDR-810.htm

- --------- End Update A Part 3 of 3 ----------

ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.

    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 also provides a section for control systems
security recommended practices on the ICS-CERT web page at:
http://ics-cert.us-cert.gov/content/recommended-practices. Several
recommended practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies. 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-912: Hidden Functionality,
    http://cwe.mitre.org/data/definitions/912.html, web site last accessed
    September 26, 2013.
    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0693,
    web site last accessed December 02, 2014.
    c. CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C,
    web site last accessed September 26, 2013.
    d. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0692,
    web site last accessed December 02, 2014.
    e. CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C,
    web site last accessed September 26, 2013.
    f. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0689,
    web site last accessed December 02, 2014.
    g. CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C,
    web site last accessed September 26, 2013.
    h. CWE-798: Use of Hard-coded Credentials,
    http://cwe.mitre.org/data/definitions/798.html, web site last accessed
    September 26, 2013.
    i. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0694,
    web site last accessed December 02, 2014.
    j. CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:S/C:C/I:C/A:C,
    web site last accessed September 26, 2013.
    k. CWE-294: Authentication Bypass by Capture-replay,
    http://cwe.mitre.org/data/definitions/294.html, web site last accessed
    December 02, 2014.
    l. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2810,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    m. CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C,
    web site last accessed December 02, 2014.


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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=GIk4
-----END PGP SIGNATURE-----