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             AUSCERT External Security Bulletin Redistribution

                          ESB-2008.0109 -- [Win]
        SwiftView ActiveX control and plug-in stack buffer overflow
                              1 February 2008


        AusCERT Security Bulletin Summary

Product:              SwiftView ActiveX control
Publisher:            US-CERT
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5602

Original Bulletin:    http://www.kb.cert.org/vuls/id/639169

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Vulnerability Note VU#639169

SwiftView ActiveX control and plug-in stack buffer overflow


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 

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:


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\{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




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
Document Revision

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