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
September 17, 2007

-- CVE ID:

-- 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:

-- 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:

-- 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.

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