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Vulnerability Note VU#922969

InterActual Player SyscheckObject ActiveX controls contain stack buffer overflows

Overview

InterActual Player provides multiple ActiveX controls that are vulnerable to buffer overflows. This can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

InterActual Player is a video DVD playing application for Windows systems. InterActual Player was formerly known as InterActual PCFriendly. The InterActual Player software provides several ActiveX controls. ActiveX controls provided by IASystemInfo.dll are vulnerable to stack buffer overflows in the ApplicationType property. Note that some versions of InterActual WinDVD provide the vulnerable ActiveX controls.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page, an HTML email message, or an HTML email attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause the web browser to crash.

III. Solution

We are currently unaware of a practical solution to this problem. Until a solution is identified, consider implementing the following workarounds.

Disable the InterActual SyscheckObject ActiveX control in Internet Explorer

The vulnerable ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs:

    {B727C210-2022-11D4-B2C6-0050DA1BD906}
    {B727C212-2022-11D4-B2C6-0050DA1BD906}
    {B727C217-2022-11D4-B2C6-0050DA1BD906}
    {B727C219-2022-11D4-B2C6-0050DA1BD906}
    {B727C21B-2022-11D4-B2C6-0050DA1BD906}
    {B727C21D-2022-11D4-B2C6-0050DA1BD906}
    {B727C220-2022-11D4-B2C6-0050DA1BD906}
    {B727C222-2022-11D4-B2C6-0050DA1BD906}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:
    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C210-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C212-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C217-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C219-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C21B-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C21D-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C220-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{B727C222-2022-11D4-B2C6-0050DA1BD906}]
    "Compatibility Flags"=dword:00000400
Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the Securing Your Web Browser document. 

Systems Affected
VendorStatusDate Updated
InterActual Technologies, Inc. Vulnerable21-Mar-2007
InterVideoVulnerable21-Mar-2007

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://secunia.com/secunia_research/2007-37/advisory/
http://secunia.com/advisories/23032/

Credit

This vulnerability was reported by Will Dormann of the CERT/CC. This vulnerability was also independently discovered and publicly disclosed by Carsten Eiram of Secunia Research before a coordinated release date could be reached.

This document was written by Will Dormann.

Other Information

Date Public03/21/2007
Date First Published03/21/2007 03:09:55 PM
Date Last Updated03/26/2007
CERT Advisory 
CVE NameCVE-2007-0348
US-CERT Technical Alerts 
Metric23.90
Document Revision14

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