Vulnerability Note VU#639169

SwiftView ActiveX control and plug-in stack buffer overflow

Overview

The SwiftView ActiveX control and plug-in contain a stack buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

SwiftView is software used to view or print PCL, HPGL, and TIFF files. SwiftSend is a product used for secure electronic document communications. Both of these products include the SwiftView ActiveX control and Netscape-style plug-in, which are provided by svocx.ocx and npsview.dll, respectively. The SwiftView ActiveX control and Netscape-style plug-in contain stack buffer overflows.

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), a remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user on a vulnerable system.

III. Solution

Apply an update

This issue is addressed in version 8.3.5 of the SwiftView and SwiftSend software. Please see eLynx Security Bulletin SBSV-07-10-02 for more details.

Disable the SwiftView ActiveX control in Internet Explorer

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

{7DD62E58-5FA8-11D2-AFB7-00104B64F126}

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{7DD62E58-5FA8-11D2-AFB7-00104B64F126}]
"Compatibility Flags"=dword:00000400

Disable the SwiftView plug-in in other browsers

The SwiftView plug-in can be disabled in other browsers, such as Firefox, by removing the npsview.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.

Systems Affected

Vendor	Status	Date Updated
SwiftView	Vulnerable	22-Oct-2007

References

http://www.cert.org/tech_tips/securing_browser
http://www.swiftview.com/tech/security/bulletins/SBSV-07-10-02.htm
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	01/30/2008
Date First Published	01/30/2008 03:14:36 PM
Date Last Updated	01/30/2008
CERT Advisory
CVE Name	CVE-2007-5602
US-CERT Technical Alerts
Metric	10.60
Document Revision	13