Updated Drivers for File and Printer Sharing Security
ID: Q128079
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The information in this article applies to:
SYMPTOMS
When you use "File and printer sharing for Microsoft Networks" or "File
and printer sharing for NetWare Networks" on a Windows 95-based computer,
remote users may be able to gain access to your entire hard disk.
When you share a folder on a Windows 95-based computer, users on UNIX-
based computers running the SMBCLIENT Samba network client who connect to
the shared folder may be able to gain access to the entire drive on which
the shared folder is located.
CAUSE
You may experience this problem with "File and printer sharing for NetWare
Networks" or with "File and printer sharing for Microsoft Networks" when
the following conditions are met.
File and Printer Sharing for NetWare Networks (Nwserver.vxd):
- Your workstation is configured to share files and printers with "File
and printer sharing for NetWare Networks."
- Remote administration or the Microsoft Remote Registry service is
enabled.
NOTE: These options are not enabled by default.
File and Printer Sharing for Microsoft Networks (Vserver.vxd):
- Your workstation is configured to share files and printers with "File
and printer sharing for Microsoft Networks."
- Your workstation connects to a LAN, Internet (SLIP or PPP account),
or Dial-Up Networking connection that can be accessed by UNIX-based
computers running the SMBCLIENT Samba network client.
- The network administrator does not disable peer services using System
Policies.
The SMBCLIENT Samba network client allows users to send illegal networking
commands over the network. At this time, the Samba client is the only
known SMBCLIENT that does not filter out such illegal commands. SMBCLIENT
users do not automatically gain access to the Windows 95 drive; these
users must know the exact steps to send these illegal commands.
RESOLUTION
To prevent these illegal commands from being run on a Windows 95 computer,
Microsoft has released new versions of the Nwserver.vxd (4.00.951) and
Vserver.vxd (4.00.952) files. These files are available in the Microsoft
Windows 95 Service Pack 1 Update Setup.exe file.
For information about Microsoft Windows 95 Service Pack 1, please see the
following article in the Microsoft Knowledge Base:
Q142794 Availability of Microsoft Windows 95 Service Pack 1
Installation
To install this update, follow these steps:
- Download the Setup.exe file from the Microsoft Software Library to
an empty folder.
- In My Computer or Windows Explorer, double-click the Setup.exe file
you downloaded in step 1.
- Follow the instructions on the screen.
The following file(s) are available for download from the Microsoft
Software Library:
~ Setup.exe
For more information about downloading files from the Microsoft Software
Library, please see the following article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
MORE INFORMATION
This problem is resolved in Microsoft Windows 98.
For additional information about Windows 95 updates, please see the
following article in the Microsoft Knowledge Base:
Q161020 Implementing Windows 95 Updates
Additional query words:
syspol msnWin95misc servicepack1
Keywords : kbenv kbnetwork 3rdpartynet msnets win95
Version : 95
Platform : WINDOWS
Issue type :