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nt4.index.server.2.0.txt

nt4.index.server.2.0.txt
Posted Aug 17, 1999
Authored by Mnemonix

Microsoft's Index Server 2.0 allows anybody to discover the physical path to directories being indexed, or if a directory found in a network share is being indexed, they can learn the name of the machine on which the share resides and the name of the user account used to access that share on behalf of Index and Internet Information Server 4.

tags | exploit
SHA-256 | 1d0ab1349677a5f4764c564c47751f2d857b11dce433226ba5d17336d4e2c794

nt4.index.server.2.0.txt

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Date: Tue, 23 Mar 1999 23:40:55 -0000
From: Mnemonix <mnemonix@GLOBALNET.CO.UK>
To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
Subject: Index Server 2.0 and the Registry


When Microsoft's Index Server 2.0 is installed on NT 4 with
Internet Information Server 4 it opens a new "AllowedPath"
into the Windows NT Registry.

Administrators can control who can access the Windows NT
Registry via the network by editing permissions on the
Winreg key found under

HKLM\SYSTEM\CurrentControlSet\Control\SecurePipeServers\Winreg

By default, on NT Server 4, the permissions on this key are
set to Administrators with Full Control. No-one else should
have access (although it doesn't really work out like this in
the end.) There are certain paths through the Registry that
remote users, whether they are Administrators are not, may
access. These are listed in the AllowedPaths subkey found
under the Winreg key. These paths are to allow basic network
operations such as printing etc to continue as normal.

Index Server 2.0 creates a new "AllowedPath":

HKLM\System\CurrentControlset\Control\ContentIndex\Catalogs

meaning that anyone with an local or domain account for that
machine, including Guests, are able to discover the physical
path to directories being indexed or if a directory found in a
network share is being index they can learn the name of the
machine on which the share resides and the name of the user
account used to access that share on behalf of Index and
Internet Information Server. Permissions on the above key and
its sub-key give Everyone read access.

Note that regedit and regedt32 can not be used to access this
information. Tools such as reg.exe or home-baked efforts must
be used.

In most cases this issue represents a mild risk, but one worth
noting and resolving by removing if this adversely affects you
and your security policy.

Cheers,
David Litchfield
http://www.infowar.co.uk/mnemonix/

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