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Category:   Application (Generic)  >   Modbus Vendors:   Automated Solutions, Inc.
Modbus 'MiniHMI.exe' ActiveX Control Heap Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1018707
SecurityTracker URL:  http://securitytracker.com/id/1018707
CVE Reference:   CVE-2007-4827   (Links to External Site)
Date:  Sep 19 2007
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Modbus. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can connect to the Modbus RTU/ASCII/TCP Slave ActiveX Control on TCP port 502 and send specially crafted data to trigger a heap overflow and execute arbitrary code on the target system.

The vulnerability resides in 'MiniHMI.exe'.

The vendor was notified on August 20, 2007.

Ganesh Devarajan reported this vulnerability via TippingPoint DVLabs.

The original advisory is available at:

http://www.zerodayinitiative.com/advisories/TPTI-07-15.html

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has issued a fix, available at:

http://www.automatedsolutions.com/pub/asmbslv/setup.exe

Vendor URL:  www.automatedsolutions.com/products/modbus.asp (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [Full-disclosure] TPTI-07-15: Automated Solutions Modbus TCP Slave

TPTI-07-15: Automated Solutions Modbus TCP Slave ActiveX Control Heap
            Corruption Vulnerability
http://www.zerodayinitiative.com/advisories/TPTI-07-15.html
September 17, 2007

-- CVE ID:
CVE-2007-4827

-- Affected Vendor:
Automated Solutions

-- Affected Products:
Modbus RTU/ASCII/TCP Slave ActiveX Control

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since September  7, 2007 by Digital Vaccine protection
filter ID 5598. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
systems with vulnerable installations of the Automated Solutions Modbus
TCP Slave ActiveX Control. Authentication is not required to exploit
this vulnerability.

The specific flaw exists within MiniHMI.exe which binds to TCP port
502. When processing malformed Modbus requests on this port a
controllable heap corruption can occur which may result in execution of
arbitrary code.

-- Vendor Response:
Automated Solutions has issued an update to correct this vulnerability.
More details can be found at:

http://www.automatedsolutions.com/pub/asmbslv/setup.exe

-- Disclosure Timeline:
2007.08.20 - Vulnerability reported to vendor
2007.09.07 - Digital Vaccine released to TippingPoint customers
2007.09.17 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Ganesh Devarajan, 
TippingPoint DVLabs.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, The Zero Day Initiative
(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is used.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com provides its
customers with zero day protection through its intrusion prevention
technology. Explicit details regarding the specifics of the
vulnerability are not exposed to any parties until an official vendor
patch is publicly available. Furthermore, with the altruistic aim of
helping to secure a broader user base, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.


CONFIDENTIALITY NOTICE: This e-mail message, including any attachments,
is being sent by 3Com for the sole use of the intended recipient(s) and
may contain confidential, proprietary and/or privileged information.
Any unauthorized review, use, disclosure and/or distribution by any 
recipient is prohibited.  If you are not the intended recipient, please
delete and/or destroy all copies of this message regardless of form and
any included attachments and notify 3Com immediately by contacting the
sender via reply e-mail or forwarding to 3Com at postmaster@3com.com. 
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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