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ESB-2012.0341 - ALERT [Win] Rockwell Automation FactoryTalk: Denial of service - Remote/unauthenticated

Date: 04 April 2012

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

                               ESB-2012.0341
      ICSA-12-088-01 ROCKWELL AUTOMATION FACTORYTALK RNADIAGRECEIVER
                               4 April 2012

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

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

Product:           Rockwell Automation FactoryTalk
Publisher:         US-CERT
Operating System:  Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2012-0222 CVE-2012-0221 

Original Bulletin: 
   http://www.us-cert.gov/control_systems/pdf/ICSA-12-088-01.pdf

Comment: Public exploits are available to target these vulnerabilities.

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

ICS-CERT ADVISORY

ICSA-12-088-01 ROCKWELL AUTOMATION FACTORYTALK RNADIAGRECEIVER

DOS VULNERABILITIES

March 28, 2012

OVERVIEW

This advisory is a follow-up to ICS-CERT Alert ICS-ALERT-12-017-01 - ROCKWELL
AUTOMATION FACTORYTALK RNADIAGRECEIVER [a] that was published January 17, 2012,
on the ICS-CERT web page.

ICS-CERT has coordinated these vulnerabilities with Rockwell Automation who
developed a patch that resolves these vulnerabilities.

AFFECTED PRODUCTS

According to Rockwell Automation's Security Taskforce, the following
Allen-Bradley products are affected by these vulnerabilities:

	* RSLogix 5000 (versions 17, 18, 19, 20)
	* Factory Talk (CPR9 up to and including CPR9 SR5)
		- FT Directory
		- FT Alarms & Events
		- FT View SE
		- FT Diagnostics
		- FT Live Data
		- FT Server Health.

IMPACT

Successful exploitation of this vulnerability may result in a DoS condition. 
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

Rockwell Automation provides industrial automation control and information
products worldwide, across a wide range of industries.

The FactoryTalk Services Platform is a collection of production and performance
management systems.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

UNEXPECTED RETURN VALUE [b]

An unexpected return value can be generated by a specially crafted packet which
can cause the Rockwell Automation FactoryTalk RNADiagReceiver service listening
on Port 4445/TCP to stop processing packets. This vulnerability may lead to a
DoS condition.

CVE-2012-0221 [c] has been assigned to this vulnerability.

READ ACCESS VIOLATION [d]

A read access violation vulnerability exists in Rockwell Automations
FactoryTalk platform. A specially crafted packet can be sent to the
RNADiagReceiver service listening on Port 4445/TCP resulting in a possible DoS
condition.

CVE-2012-0222 [e] has been assigned to this vulnerability.

VULNERABILITY DETAILS

EXPLOITABILITY

These vulnerabilities are remotely exploitable.

EXISTENCE OF EXPLOIT

Public exploits are known that target these vulnerabilities.

DIFFICULTY

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

MITIGATION

Rockwell has developed a security update to address these vulnerabilities. To
download and install the update please refer to Rockwells Advisory at 
http://rockwellautomation.custhelp.com/app/answers/detail/a_id/469937. 

For more information on security with Rockwell Automation products, please
refer to Rockwells Security Advisory Index at
http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102.

In addition to applying the above patch, Rockwell Automation recommends
customers configure firewalls to block the following TCP ports to prevent
traversal of RNA messages into and out of the ICS system: 
 1330
 1331
 1332
 4241
 4242
 4445
 4446
 6543
 9111
 60093
 49281.

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 devices.

The Control Systems Security Program (CSSP) also provides a section for control
systems security recommended practices on the CSSP web page. Several
recommended practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies. [f]  ICS-CERT reminds organizations to perform proper impact
analysis and risk assessment prior to taking defensive measures.

In addition, ICS-CERT recommends that users take the following measures to
protect themselves from social engineering attacks: 

	1. Do not click web links or open unsolicited attachments in e-mail
	messages 
	
	2. Refer to Recognizing and Avoiding Email Scams [g] for more
	information on avoiding e-mail scams
	
	3. Refer to Avoiding Social Engineering and Phishing Attacks [h] for
	more information on social engineering attacks. 

For any questions related to this report, please contact ICS-CERT at:
E-mail: ics-cert@dhs.gov
Toll Free: 1-877-776-7585
For CSSP Information and Incident Reporting: www.ics-cert.org

DOCUMENT FAQ

What is an ICS-CERT Advisory? An ICS-CERT Advisory is intended to provide
awareness or solicit feedback from critical infrastructure owners and operators
concerning ongoing cyber events or activity with the potential to impact
critical infrastructure computing networks.

When is vulnerability attribution provided to researchers? Attribution for
vulnerability discovery is always provided to the vulnerability reporter
unless the reporter notifies ICS-CERT that they wish to remain anonymous.
ICS-CERT encourages researchers to coordinate vulnerability details before
public release. The public release of vulnerability details prior to the
development of proper mitigations may put industrial control systems and the
public at avoidable risk.

REFERENCES

a. http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-12-017-01.pdf, date
last accessed March 27, 2012
b. CWE, http://cwe.mitre.org/data/definitions/389.html, CWE-389: Error
Conditions, Return Values, Status Codes. This website last accessed March 27,
2012.
c. CWE, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0221, NIST
uses this advisory to create the CVE website report. This website will be
active sometime after publication of this advisory.
d. CWE, http://cwe.mitre.org/data/definitions/125.html, CWE-125: Out-of-bounds
Read. This website last accessed March 27, 2012.
e. NIST, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0222, NIST
uses this advisory to create the CVE website report. This website will be
active sometime after publication of this advisory.
f. CSSP Recommended Practices,
http://www.us-cert.gov/control_systems/practices/Recommended_Practices.html,
website last accessed March 27, 2012.
g. Recognizing and Avoiding Email Scams,
http://www.us-cert.gov/reading_room/emailscams_0905.pdf, website last accessed
March 27, 2012.
h. National Cyber Alert System Cyber Security Tip ST04-014,
http://www.us-cert.gov/cas/tips/ST04-014.html, website last accessed March 27,
2012.

- --------------------------END INCLUDED TEXT--------------------

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This security bulletin is provided as a service to AusCERT's members.  As
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NOTE: This is only the original release of the security bulletin.  It may
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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.
===========================================================================
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