Vulnerability Note VU#145313

Novell iPrint Client ActiveX control stack buffer overflows

Overview

The Novell iPrint Client ActiveX control contains multiple stack buffer overflows, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Novell iPrint is a software printing solution that allows for printing over the internet. One of the components of iPrint is an ActiveX control, which is provided by the file ienipp.ocx. This ActiveX control contains buffer overflows in multiple initialization parameters.

II. 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.

III. Solution

Apply an update

This issue is addressed in the Novell iPrint Client for Windows 4.36. Please see the Novell Support document 5028061 for more details.

Disable the Novell iPrint Client ActiveX control in Internet Explorer

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

{36723F97-7AA0-11D4-8919-FF2D71D0D32C}

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_MACHINESOFTWAREMicrosoftInternet ExplorerActiveX Compatibility{36723F97-7AA0-11D4-8919-FF2D71D0D32C}]
"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

Vendor	Status	Date Updated
Novell, Inc.	Vulnerable	18-Jun-2008

References

http://www.cert.org/tech_tips/securing_browser/
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5028061.html
http://download.novell.com/Download?buildid=cbAVckbi_AM~
http://www.novell.com/products/netware/printing/quicklook.html
http://secunia.com/advisories/30709/
http://support.microsoft.com/kb/240797

Credit

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

This document was written by Will Dormann.

Other Information

Date Public	06/12/2008
Date First Published	06/18/2008 10:06:41 AM
Date Last Updated	06/18/2008
CERT Advisory
CVE Name
US-CERT Technical Alerts
Metric	10.94
Document Revision	2