bugtraq - TPTI-07-15: Automated Solutions Modbus TCP Slave ActiveX Control Heap Corruption Vulnerability

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Date: Tue, 18 Sep 2007 11:33:29 -0700
From: TSRT@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	vulnwatch@...nwatch.org, vulndiscuss@...nwatch.org
Cc: zdi-disclosures@...m.com
Subject: TPTI-07-15: Automated Solutions Modbus TCP Slave ActiveX Control Heap
 Corruption Vulnerability

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.

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