Vulnerability Note VU#406937

PhotoStockPlus Uploader Tool ActiveX stack buffer overflows

Original Release date: 19 May 2008 | Last revised: 13 Apr 2009

Overview

The PhotoStockPlus Uploader Tool ActiveX control contains several stack buffer overflows, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

PhotoStockPlus provides an image uploader ActiveX control, which is provided by the file PSPUploader.ocx. This ActiveX control contains stack buffer overflows in multiple initialization parameters, which can allow an overwrite of the process Structured Exception Handler (SEH).

PhotoStockPlus has indicated that the vulnerable ActiveX control is no longer used by the company. However, it is important to realize that any system that has used the control in the past may be at risk.

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.

Solution

Apply an update
This ActiveX control has been disabled in Internet Explorer with the update for Microsoft Security Advisory (956391).

Disable the PhotoStockPlus Uploader Tool ActiveX control in Internet Explorer


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

    {E48BB416-C578-4A62-84C9-5E3389ABE5FC}
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\{E48BB416-C578-4A62-84C9-5E3389ABE5FC}]
    "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 (Learn More)

VendorStatusDate NotifiedDate Updated
Photo Stock Plus . ComAffected16 Aug 200614 Oct 2008
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

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

References

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

  • CVE IDs: CVE-2008-0957
  • Date Public: 19 May 2008
  • Date First Published: 19 May 2008
  • Date Last Updated: 13 Apr 2009
  • Severity Metric: 1.70
  • Document Revision: 15

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