根据以前的发现,windowsNT密码虽然不象Windows95那样以简单加密形式包含在一个文件里面,而是

一些杂乱的暗码,分别藏在7个不同的地方。这篇最新发表的文章告诉我们,WindowsNT密码隐藏的第八个地方。

Date: Mon, 22 Feb 1999 11:26:41 +0100

From: Patrick CHAMBET <pchambet@club-internet.fr>

To: sans@clark.net

Subject: Alert: IIS 4.0 metabase can reveal plaintext passwords

Hi all,

We knew that Windows NT passwords are stored in 7 different places across

the system. Here is a 8th place: the IIS 4.0 metabase.

IIS 4.0 uses its own configuration database, named "metabase", which can

be compared to the Windows Registry: the metabase is organised in Hives,

Keys and Values. It is stored in the following file:

C:\WINNT\system32\inetsrv\MetaBase.bin

The IIS 4.0 metabase contains these passwords:

- IUSR_ComputerName account password (only if you have typed it in the

MMC)

- IWAM_ComputerName account password (ALWAYS !)

- UNC username and password used to connect to another server if one of

your virtual directories is located there.

- The user name and password used to connect to the ODBC DSN called

"HTTPLOG" (if you chose to store your Logs into a database).

Note that the usernames are in unicode, clear text, that the passwords are

srambled in the metabase.ini file, and that only Administrators and SYSTEM

have permissions on this file.

BUT a few lines of script in a WSH script or in an ASP page allow to print

these passwords in CLEAR TEXT.

The user name and password used to connect to the Logs DSN could allow a

malicious user to delete traces of his activities on the server.

Obviously this represents a significant risk for Web servers that allow

logons and/or remote access, although I did not see any exploit of the

problem I am reporting yet. Here is an example of what can be gathered:

"

IIS 4.0 Metabase

?Patrick Chambet 1998 - pchambet@club-internet.fr

--- UNC User ---

UNC User name: 'Lou'

UNC User password: 'Microsoft'

UNC Authentication Pass Through: 'False'

--- Anonymous User ---

Anonymous User name: 'IUSR_SERVER'

Anonymous User password: 'x1fj5h_iopNNsp'

Password synchronization: 'False'

--- IIS Logs DSN User ---

ODBC DSN name: 'HTTPLOG'

ODBC table name: 'InternetLog'

ODBC User name: 'InternetAdmin'

ODBC User password: 'xxxxxx'

--- Web Applications User ---

WAM User name: 'IWAM_SERVER'

WAM User password: 'Aj8_g2sAhjlk2'

Default Logon Domain: ''

"

For example, you can imagine the following scenario:

A user Bob is allowed to logon only on a server hosting IIS 4.0, say

server (a). He need not to be an Administrator. He can be for example

an IIS 4.0 Web Site Operator. Then, he launches a WSH script that extracts

the login name and password of the account used to access to a virtual

directory located on another server, say (b).

Now, Bob can use these login name and passord to logon on server (b).

And so forth...

Microsoft was informed of this vulnerability.

_______________________________________________________________________

Patrick CHAMBET - pchambet@club-internet.fr

MCP NT 4.0

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