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Linksys WVC54GC NetCamPlayerWeb11gv2 ActiveX control stack buffer overflow

Vulnerability Note VU#639345

Original Release Date: 2008-12-05 | Last Revised: 2008-12-05

Overview

The Linksys WVC54GC NetCamPlayerWeb11gv2 ActiveX control contains a stack buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

The Linksys WVC54GC wireless video camera provides an ActiveX control called NetCamPlayerWeb11gv2, which is provided by the file NetCamPlayerWeb11gv2.ocx. This ActiveX control contains a stack buffer overflow in the SetSource() method.

Impact

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

Solution

Apply an update

This vulnerability is addressed in WVC54GC firmware version 1.25. Please see the release notes for more details. Note that any client system that has installed the ActiveX control must connect to the camera and install the updated control.


Disable the NetCamPlayerWeb11gv2 ActiveX control in Internet Explorer

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

{D7208880-9B7A-43E1-AABB-8C888A5704F9}
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\{D7208880-9B7A-43E1-AABB-8C888A5704F9}]
"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. 

Vendor Information

639345
Expand all

Linksys (A division of Cisco Systems)

Notified:  August 15, 2008 Updated:  December 05, 2008

Status

  Vulnerable

Vendor Statement

Vulnerability 2: ActiveX Stack-Based Buffer Overflow

Description: long invalid arguments on ActiveX will cause overflow triggered
Solution: 2300 and 210 have no such issue. The method of passing arguments to ActiveX is changed.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

This vulnerability is addressed in WVC54GC firmware version 1.25. Please see the release notes for more details. Note that any client system that has installed the ActiveX control must connect to the camera and install the updated control.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Andre Protas of eEye for reporting this vulnerability, who in turn also credits Greg Linares of eEye.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2008-4391
Severity Metric: 2.73
Date Public: 2008-01-03
Date First Published: 2008-12-05
Date Last Updated: 2008-12-05 22:19 UTC
Document Revision: 3

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