Electronic Arts SnoopyCtrl ActiveX control and plug-in stack buffer overflows

Overview

The Electronic Arts SnoopyCtrl ActiveX control and plug-in contains multiple stack buffer overflows, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Electronic Arts (EA.com) provides an ActiveX control and Netscape-style plug-in called SnoopyCtrl. This control, provided by NPSnpy.dll, is included with an EA.com update package. The SnoopyCtrl ActiveX control and plug-in contains buffer overflow vulnerabilities in multiple methods and initialization parameters.

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Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), a remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user on a vulnerable system.

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Solution

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

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Disable the SnoopyCtrl ActiveX control in Internet Explorer

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

{525A15D0-4938-11D4-94C7-0050DA20189B}
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\{525A15D0-4938-11D4-94C7-0050DA20189B}]
"Compatibility Flags"=dword:00000400
Disable the SnoopyCtrl plug-in in other browsers

The SnoopyCtrl plug-in can be disabled in other browsers, such as Firefox, by removing the NPSnpy.dll file from the plugins directory.

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.

Disable plug-ins

Disabling plug-ins by default can prevent exploitation of this and other plug-in vulnerabilities. This can be accomplished by configuring NoScript to Forbid other plugins for untrusted sites.

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Vendor Information

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Electronic Arts __ Affected

Notified: June 04, 2007 Updated: August 25, 2007

Status

Affected

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.

Addendum

Please disable the vulnerable ActiveX control and plug-in.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23179281 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://secunia.com/advisories/27143/&gt;
• <http://www.securityfocus.com/bid/25970&gt;
• <http://support.microsoft.com/kb/240797&gt;
• <https://addons.mozilla.org/en-US/firefox/addon/722&gt;

Acknowledgements

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

This document was written by Will Dormann.

Other Information

CVE IDs:	CVE-2007-4466
Severity Metric:	4.02 Date Public: