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Category:   Application (Security)  >   McAfee VirusScan Vendors:   McAfee
McAfee VirusScan Enterprise Buffer Overflow in Processing Multi-Byte Character Filenames May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017928
SecurityTracker URL:  http://securitytracker.com/id/1017928
CVE Reference:   CVE-2007-2152   (Links to External Site)
Updated:  May 14 2008
Original Entry Date:  Apr 18 2007
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.0i prior to Patch 12
Description:   A vulnerability was reported in McAfee VirusScan. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a file with a specially crafted filename (containing multi-byte characters) that, when processed by the target application, will trigger a buffer overflow and disable the On-Access scanner or potentially execute arbitrary code on the target system. The code will run with System privileges.

Only systems with East Asia language files installed and with the default Unicode codepage set to a language that contains multi-byte characters (e.g., Chinese) are affected.

The vendor was notified on February 8, 2007.

iDefense Labs discovered this vulnerability.

Impact:   A remote user can create a file that, when processed by the target application, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fixed version of VirusScan Enterprise (8.0i Patch 12).

The McAfee advisory is available at:

https://knowledge.mcafee.com/SupportSite/dynamickc.do?externalId=612750&command=show&forward=nonthreadedKC

Vendor URL:  knowledge.mcafee.com/SupportSite/dynamickc.do?externalId=612750&command=show&forward=nonthreadedKC (Links to External Site)
Cause:   Boundary error
Underlying OS:   Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Tue, 17 Apr 2007 20:15:22 -0400
Subject:  iDefense Security Advisory 04.17.07: McAfee VirusScan On-Access

McAfee VirusScan On-Access Scanner Long Unicode File Name Buffer Overflow

iDefense Security Advisory 04.17.07
http://labs.idefense.com/intelligence/vulnerabilities/
Apr 17, 2007

I. BACKGROUND

McAfee VirusScan is an AntiVirus application that offers protection
against the latest computer virus threats. More information can be
found on the vendor's site at the following URL.

http://www.mcafee.com/us/enterprise/products/anti_virus/file_servers_desktops/virusscan_enterprise_80i.html

II. DESCRIPTION

Remote exploitation of a buffer overflow vulnerability in McAfee's
VirusScan Antivirus application allows attackers to disable the
On-Access scanner or potentially execute arbitrary code with SYSTEM
privileges.

The McAfee On-Access scanner component contains a common software flaw
that leads to heap corruption when dealing with overly long file names
that contain multi-byte characters.

This flaw only manifests itself when the target system has East Asia
language files installed and the default Unicode codepage is set to a
language which contains multi-byte characters such as Chinese.

III. ANALYSIS

Exploitation allows attackers to disable the On-Access Scanner component
of McAfee VirusScan or potentially execute arbitrary code with SYSTEM
privileges.

In order to exploit this vulnerability, an attacker needs to be able to
place a file with an overly long file name on the victims computer. The
file name would have to contain multi-byte characters such as Chinese
native characters. If the On-Access scanner is enabled, simply hovering
the mouse over the file to view the file properties or attempting to
open the file will trigger the overflow.

Standard archive manipulation programs such as WinZip and Windows
Compressed Folder viewer cannot handle files capable of exploiting this
vulnerability.

IV. DETECTION

iDefense has confirmed this vulnerability in McAfee VirusScan 8.0
Enterprise. Previous versions are suspected vulnerable as well.

V. WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VI. VENDOR RESPONSE

McAfee has addressed this vulnerability in Patch 12 of VirusScan
Enterprise 8.0i. They recommend installing the latest available patch
(Patch15). More information is available in McAfee's Security Bulletin
612750 at the following URL.

https://knowledge.mcafee.com/SupportSite/dynamickc.do?externalId=612750&command=show&forward=nonthreadedKC

VII. CVE INFORMATION

A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.

VIII. DISCLOSURE TIMELINE

02/08/2007  Initial vendor notification
02/08/2007  Initial vendor response
04/17/2007  Coordinated public disclosure

IX. CREDIT

This vulnerability was discovered by iDefense Labs.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright  2007 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
 There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
reliance on, this information.
_______________________________________________
To unsubscribe, go here:
http://www.idefense.com/mailman/listinfo/idlabs-advisories


 
 


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