Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

     GE Proficy HMI/SCADA CIMPLICITY WebView Improper Input Validation
                               1 August 2013


        AusCERT Security Bulletin Summary

Product:           GE Proficy HMI/SCADA CIMPLICITY
Publisher:         US-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-2785  

Original Bulletin: 

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


Advisory (ICSA-13-170-01)

GE Proficy HMI/SCADA CIMPLICITY WebView Improper Input Validation

Original release date: July 30, 2013


Independent researchers ZombiE and amisto0x07 have identified an improper input
validation vulnerability in the GE CIMPLICITY WebView application. GE has 
produced an update that mitigates this vulnerability.

GE has released a security advisory (GEIP13-03) available on the GE Intelligent
Platforms support Web site to inform customers about this vulnerability.

This vulnerability could be exploited remotely.


The following GE CIMPLICITY versions are affected:

    Proficy HMI/SCADA - CIMPLICITY: Version 4.01 to 8.2, and
    Proficy Process Systems with CIMPLICITY.


If the vulnerability is exploited, it could allow an unauthenticated remote 
attacker to cause the CIMPLICITY WebView and/or CIMPLITY built-in Web server to
crash, or to run arbitrary commands on a server running the affected software,
or could potentially allow an attacker to take control of the CIMPLICITY server.

An attacker can exploit the vulnerability by sending malicious messages over a 
TCP connection to the listening service. The attacks do not require 
authentication and can be conducted remotely. The vulnerable components are not
enabled by default.

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.


According to GE, Proficy HMI/SCADA-CIMPLICITY is a Client/Server-based 
human-machine interface/supervisory control and data acquisition (HMI/SCADA) 
application, which is deployed across multiple industries.




The CimWebServer does not properly validate inputted information. By sending a 
specially crafted packet, an attacker could crash the WebView or built-in Web 
server, run arbitrary commands on a server running the affected software, or 
take control of the server. The vulnerable CIMPLICITY built-in Web server 
component is not enabled by default.

CVE-2013-2785b has been assigned to this vulnerability. A CVSS v2 base score of
8.8 has been assigned; the CVSS vector string is (AV:N/AC:M/Au:N/C:N/I:C/A:C).c



This vulnerability could be exploited remotely.

No known public exploits specifically target this vulnerability.

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

GE has released the following product updates that resolve this vulnerability:

    Proficy HMI/SCADA - CIMPLICITY 8.2 SIM 19
    Proficy HMI/SCADA - CIMPLICITY 8.1 SIM 25
    Proficy HMI/SCADA - CIMPLICITY 8.0 SIM 27

All the updates can be found at:


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. Critical devices 
    should not directly face 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 VPN is only as secure as the connected 

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT Web page. Several recommended practices are available
for reading and download, including Improving Industrial Control Systems 
Cybersecurity with Defense-in-Depth Strategiesd ICS-CERT reminds organizations
to perform proper impact analysis and risk assessment prior to taking defensive

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 Strategiese, that is available for download 
from the ICS-CERT Web page (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-20: Improper Input Validation, 
       Web site last accessed July  30, 2013.

    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2785, 
       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, 
       Web site last accessed July  30, 2013.
    d. CSSP Recommended Practices, 
       Web site last accessed July  30, 2013.
    e. Targeted Cyber Intrusion Detection and Mitigation Strategies, 
       http://ics-cert.us-cert.gov/tips/ICS-TIP-12-146-01B, Web site last 
       accessed July  30, 2013.

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: 

ICS-CERT continuously strives to improve its products and services. You can 
help by answering a short series of questions about this product at the 
following URL: https://forms.us-cert.gov/ncsd-feedback/.


For Legal Information pertaining to this document, please consult 

- --------------------------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:


Australian Computer Emergency Response Team
The University of Queensland
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.
Comment: http://www.auscert.org.au/render.html?it=1967