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

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

                               ESB-2015.0353
                    Advantech EKI-1200 Buffer Overflow
                             12 February 2015

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

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

Product:           Advantech EKI-1200 products
Publisher:         US-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-8385  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-15-041-01

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

Advisory (ICSA-15-041-01)

Advantech EKI-1200 Buffer Overflow

Original release date: February 10, 2015

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

Enrique Nissim and Pablo Lorenzzato from Core Security Engineering Team have 
identified a buffer overflow vulnerability in Advantech EKI-1200 product line.
Advantech has produced a patch that mitigates this vulnerability. CORE 
Security has tested the patch to validate that it resolves the vulnerability.

This vulnerability could be exploited remotely.

AFFECTED PRODUCTS

Advantech reports that the vulnerability affects the following products:

    EKI-1200 product line.

IMPACT

An exploit of this vulnerability could allow an attacker to 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 this vulnerability based on their operational environment, 
architecture, and product implementation.

BACKGROUND

Advantech is based in Taiwan and has distribution offices in 21 countries 
worldwide.

The EKI-1200 series Modbus gateways are bi-directional gateways for 
integrating Modbus/RTU and Modbus/ASCII serial devices to TCP/IP 
networked-based devices. These products are deployed in industrial automation
globally.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

BUFFER OVERFLOW [a]

Advantech EKI-1200 products are vulnerable to a buffer overflow, which can be
exploited by remote attackers to execute arbitrary code.

CVE-2014-8385 [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]

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill would be able to exploit this vulnerability.

MITIGATION

Advantech has created new firmware Version 1.63 to mitigate this 
vulnerability. Users may download the patch from the following location at 
Advantechs web site:

http://support.advantech.com.tw/Support/DownloadSRDetail_New.aspx?SR_ID=1-V6XOHK&Doc_Source=Download

For additional information about the EKI 1221, please visit the following 
Advantech web site:

http://www.advantech.com/products/INDUSTRIAL_COMMUNICATION/EKI-1221/mod_A4DB49EB-38F0-4745-A83C-B0EAC73AC0B3.aspx

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 ICSCERT 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-122: Heap-based Buffer Overflow, 
    http://cwe.mitre.org/data/definitions/122.html, web site last accessed 
    February 10, 2015.

    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-8385, 
    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, 
    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 February 10, 2015.

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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=lvWV
-----END PGP SIGNATURE-----