From: SecuriTeam <support@securiteam.com.>
To: [email protected]
Date: 5 Apr 2005 07:36:31 +0200
Subject: [UNIX] AS/400 FTP Server User Accounts Disclosure
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AS/400 FTP Server User Accounts Disclosure
------------------------------------------------------------------------
SUMMARY
AS/400 servers support FTP in two modes, legacy mode and IFS mode, and
supports switching between both modes by a special FTP command. When in
IFS mode, it is possible to create a special symbolic link file and
retrieve the full list of user accounts.
DETAILS
The iSeries FTP server supports two methods to looks at disk contents. You
can view and manipulate existing libraries and database files inside the
libraries in the traditional legacy mode, or as part of the Integrated
File System (IFS).
The iSeries FTP server can be instructed to change the mode from legacy to
IFS by special FTP commands.
The ADDLNK AS/400 utility creates a symbolic link file in IFS that may act
as a pointer to any AS/400 object, including the QSYS library.
This utility can be executed from an FTP session by the special RCMD FTP
command.
When an FTP client connects to an AS/400 server, changes the mode to IFS
mode, and lists the contents of a symbolic link pointing at the QSYS
library, he receives the full list of user accounts, including last log in
date, and account authorities.
ADDITIONAL INFORMATION
The information has been provided by <mailto:shalom@venera.com.> Shalom
Carmel.
The original article can be found at:
<http://www.venera.com/downloads/AS400_user_accounts_ftp_disclosure.pdf>;
http://www.venera.com/downloads/AS400_user_accounts_ftp_disclosure.pdf
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