Retro64 / Miniclip CR64Loader ActiveX control buffer overflow

ID VU:649289
Type cert
Reporter CERT
Modified 2006-09-07T00:00:00



The Retro64 / Miniclip CR64Loader ActiveX control contains a buffer overflow vulnerability. This may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


The CR64Loader Object is an ActiveX control developed by Retro64. The web sites and have used this ActiveX control to provide online games. This ActiveX control, which has a CLSID of {288C5F13-7E52-4ADA-A32E-F5BF9D125F99}, contains a buffer overflow vulnerability. Although the ActiveX control is no longer in use by either or, any system that has used certain pages of these web sites in the past may be vulnerable.


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.


Disable the CR64Loader ActiveX control

The CR64Loader ActiveX control can be disabled 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.

Disable ActiveX

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

Systems Affected

Vendor| Status| Date Notified| Date Updated
Miniclip Limited| | 01 Sep 2006| 02 Sep 2006
Retro64| | 01 Sep 2006| 01 Sep 2006
If you are a vendor and your product is affected, let us know.

CVSS Metrics

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


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

This document was written by Will Dormann.

Other Information

  • CVE IDs: CVE-2006-4555
  • Date Public: 01 Sep 2006
  • Date First Published: 01 Sep 2006
  • Date Last Updated: 07 Sep 2006
  • Severity Metric: 1.67
  • Document Revision: 7