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CERT Coordination Center

Callisto PhotoParade Player PhPInfo ActiveX control buffer overflow

Vulnerability Note VU#171449

Original Release Date: 2007-09-12 | Last Revised: 2007-09-12


The Callisto PhotoParade Player PhPInfo ActiveX control contains a buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


Callisto PhotoParade Player includes an ActiveX control called PhPinfo. The ActiveX control is provided by the file PhPCtrl.dll. The FileVersionOf property of this ActiveX control is vulnerable to a buffer overflow.


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 the web browser to crash.


We are currently unaware of a practical solution to this problem. Please consider the following workarounds:

Disable the Callisto PhotoParade Player PhPInfo ActiveX control in Internet Explorer

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

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\{0115A685-ED24-4F7B-A08E-3BD15D84E668}]
"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


Callisto Corporation Affected

Notified:  January 02, 2007 Updated: April 16, 2007



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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


Please disable the vulnerable ActiveX control.

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

CVSS Metrics

Group Score Vector



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

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-1688
Severity Metric: 2.60
Date Public: 2007-09-12
Date First Published: 2007-09-12
Date Last Updated: 2007-09-12 21:50 UTC
Document Revision: 9

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