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
(Links to External Site)
Updated: May 14 2008|
Original Entry Date: Apr 18 2007
Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 8.0i prior to Patch 12|
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.
A remote user can create a file that, when processed by the target application, will execute arbitrary code on the target user's system.|
The vendor has issued a fixed version of VirusScan Enterprise (8.0i Patch 12).|
The McAfee advisory is available at:
Vendor URL: knowledge.mcafee.com/SupportSite/dynamickc.do?externalId=612750&command=show&forward=nonthreadedKC (Links to External Site)
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
Apr 17, 2007
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.
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
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.
Exploitation allows attackers to disable the On-Access Scanner component
of McAfee VirusScan or potentially execute arbitrary code with SYSTEM
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
iDefense has confirmed this vulnerability in McAfee VirusScan 8.0
Enterprise. Previous versions are suspected vulnerable as well.
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.
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
This vulnerability was discovered by iDefense Labs.
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Copyright © 2007 iDefense, Inc.
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