Operating System:

[Win]

Published:

01 July 2016

Protect yourself against future threats.

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

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

                               ESB-2016.1647
         Eaton ELCSoft Programming Software Memory Vulnerabilities
                                1 July 2016

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

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

Product:           Eaton ELCSoft Programming Software
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-4512 CVE-2016-4509 

Original Bulletin: 
   http://ics-cert.us-cert.gov/advisories/ICSA-16-182-01

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

Advisory (ICSA-16-182-01)

Eaton ELCSoft Programming Software Memory Vulnerabilities

Original release date: June 30, 2016

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

Ariele Calgaviano working with Zero Day Initiative has identified a heap-based
memory corruption vulnerability and a stack buffer overflow vulnerability in 
Eatons ELCSoft programming software. Eaton has released a revision to mitigate
these vulnerabilities.

These vulnerabilities could be exploited remotely.

AFFECTED PRODUCTS

The following ELCSoft programming software versions are affected:

    ELCSoft Version 2.4.01 and earlier.

IMPACT

An attacker may be able to exploit these vulnerabilities to execute arbitrary
code on the target system.

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, 
architecture, and product implementation.

BACKGROUND

Eaton is a US-based company that maintains offices worldwide.

The affected product, ELCSoft programming software, is used to configure all 
Eaton ELC programmable logic controllers deployed by power grid operators to 
apply protection and communications support for overcurrent devices such as 
reclosers and circuit breakers. According to Eaton, this product is used 
primarily in the Energy sector. Eaton estimates this product is used 
worldwide. While the ELC controllers themselves do not exhibit this 
vulnerability, the PCs used to configure the logic in the ELC exhibit this 
vulnerability when running the ELCSoft editor.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

HEAP-BASED BUFFER OVERFLOW [a]

A proof-of-concept file can be run after page heap is turned on for 
elcsoft.exe.

CVE-2016-4509 [b] has been assigned to this vulnerability. A CVSS v3 base score 
of 6.0 has been assigned; the CVSS vector string is 
(AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L). [c]

STACK-BASED BUFFER OVERFLOW [d]

The ELCSimulator copies the input network packet into a fixed size stack 
buffer without checking if it will fit.

CVE-2016-4512 [e] has been assigned to this vulnerability. A CVSS v3 base score 
of 7.3 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). [f]

VULNERABILITY DETAILS

EXPLOITABILITY

These vulnerabilities could be exploited remotely.

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

Eaton has released a revision that mitigates these vulnerabilities. The 
revision can be downloaded at:

https://eatonfilesharing.box.com/s/r4ulykfay2x5nlai9pqijivdh1zyks98 (link is 
external).

Eaton states the current firmware needs to be uninstalled prior to loading the
update.

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 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 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.

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 June 
30, 2016.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4509, 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:H/PR:L/UI:N/S..., 
web site last accessed June 30, 2016.

d. CWE-121: Stack-based Buffer Overflow, 
http://cwe.mitre.org/data/definitions/121.html, web site last accessed June 
30, 2016.

e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4512, 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 June 30, 2016.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)

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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=FKAX
-----END PGP SIGNATURE-----