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Category:   Application (Security)  >   Trend Micro OfficeScan Vendors:   Trend Micro
Trend Micro's OfficeScan Fails to Scan Files With Certain Types of Long NTFS File Path Names
SecurityTracker Alert ID:  1003477
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Feb 8 2002
Impact:   Modification of system information
Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in Trend Micro's OfficeScan (and potentially other virus scanning products). A local user or a virus may create a file with an NTFS file path name that cannot be scanned by the anti-virus engine.

It is reported that a file with a file path name containing more than 256 characters will not be scanned by the anti-virus scanner.

It is reported that a long folderpath can be substituted with a short file name using the "SUBST" command. A local user can change the current drive to the substituted drive to cause the path length to be reset to 3 characters (e.g., Q:\). This can apparently be repeated such that a very long file path name is created that appears to be a short file path name. It is reported that the anti-virus scanner cannot follow the deep path name.

Impact:   A local user (or virus code) can create a file with a particular type of file path name that will not be scanned by the anti-virus scanning engine.
Solution:   No solution was available at the time of this entry. It is reported that Trend Micro is working on releasing a fixed version (5.5).
Vendor URL: (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Windows (NT), Windows (2000)

Message History:   None.

 Source Message Contents

Subject:  Long Path Exploit on NTFS

With regards to the virus checking and long paths problem, when the topic
originally came up, I tested Trend Officescan against this problem.  It is
vulnerable.  Trend have confirmed to me that the problem will be fixed in
version 5.5 , and I am awaiting a confirmed date from them as to when it
will be available.


Mark Ng


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