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U-108: Net4Switch ipswcom ActiveX Control Buffer Overflow Vulnerability

February 22, 2012 - 8:00am

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PROBLEM:

A vulnerability was reported in Net4Switch ipswcom ActiveX Control, which can be exploited by malicious people to compromise a user's system.

PLATFORM:

Net4Switch ipswcom ActiveX Control 1.x

ABSTRACT:

The vulnerability is caused due to a boundary error within the "CxDbgPrint()" function (cxcmrt.dll) when creating a debug message string.

reference LINKS:

Vendor Advisory
Secunia Advisroy 48125
No CVE references.

IMPACT ASSESSMENT:

High

Discussion:

The vulnerability is caused due to a boundary error within the "CxDbgPrint()" function (cxcmrt.dll) when creating a debug message string. This can be exploited to cause a stack-based buffer overflow via an overly long string passed to the "Alert()" method. Successful exploitation allows execution of arbitrary code. The vulnerability is confirmed in version 1.0.0020 (ipswcom 1.0.0.1). Other versions may also be affected.

Impact:

Remote system access

Solution:

Set the kill-bit for the affected ActiveX control.

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