Vulnerability Note VU#914785

SoftArtisans XFile FileManager ActiveX control stack buffer overflows

Overview

The SoftArtisans XFile FileManager ActiveX control contains several stack buffer overflows, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

SoftArtisans XFile is an ActiveX file transfer application. The XFile FileManager ActiveX control, which is included with XFile, contains multiple stack buffer overflow vulnerabilities. The XFile FileManager ActiveX control is provided by the file SAFmgPws.dll. Vulnerable methods include BuildPath(), GetDriveName(), DriveExists(), and DeleteFile().

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. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash.

III. Solution

Apply an update

This vulnerability addressed in SoftArtisans XFile 2.4.0. Please see the release notes for more details.

Disable the XFile FileManager ActiveX control in Internet Explorer

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

{E7B62F4E-82F4-11D2-BD41-00105A0A7E89}

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\{E7B62F4E-82F4-11D2-BD41-00105A0A7E89}]

"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
SoftArtisans, Inc	Vulnerable	25-Aug-2008

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://support.softartisans.com/Support-114.aspx
http://fileup.softartisans.com/fileup-122.aspx
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	08/25/2007
Date First Published	08/25/2008 04:03:33 PM
Date Last Updated	08/25/2008
CERT Advisory
CVE Name	CVE-2007-1682
Metric	3.10
Document Revision	14

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