Re: Citrix ClearPassword (launch.ica)

From: <miguel.dilaj(at)pharma.novartis.com>
Date: Tue Feb 25 2003 - 05:15:22 EST

Hello wirepair

In http://www.dabcc.com/nfuse/Docs/ica_file_explained.htm you've this:

Password=
Specifies the password for the user account. This is an optional field. The password, if used, must be encrypted. To enter an encrypted password into the ICA file, use the Citrix ICA Client Remote Application Manager New Entry Wizard to create a remote application entry. When you are prompted for the username and password, enter the password that you want to use in the ICA file. Finish the New Entry wizard. Open the file APPSRV.INI in the Windows directory and locate the entry you just created. Copy the password value and paste it into your ICA file.

ClearPassword=
Specifies the clear text (unencrypted) password for the user account. This is an optional field. To use a clear text password, the Password field must be set to a null value (for example: Password=).

>From this information, it seems that the string 'D4239AF390DB09' isn't a hash, but the password itself (sounds strange, isn't it? But
worth trying...).
I haven't found info on the encryption algorithm used, but, alas, I didn't search too much ;-)
Cheers,
Miguel
aka Nekromancer

"wirepair" <wirepair@roguemail.net>
24/02/2003 20:05  

        To:     vuln-dev@securityfocus.com, pen-test@securityfocus.com
        cc: 
        Subject:        Citrix ClearPassword (launch.ica)

while doing a pen-test I noticed after stealing launch.ica files from a users IE cache directory, they have a different ClearPassword= field. It appears of AutologonAllowed is set to ON this will be saved after using nFUSE to login to the citrix metaframe. These fields are as follows:
AutologonAllowed=ON
Username=test
Domain=\25A43DEFACEDCODE (16 bytes, hash) ClearPassword=D4239AF390DB09 (16 bytes, hash..) This obviously is an issue, the ClearPassword worries me, unfortunately I'm not a cipher kid so I'm not exactly sure what type of hash this is, or how it was created. I tried after researching how the password is kept in the APPSRV.INI file and tried to mimic the length but alas it did not work. If you have any information regarding what cipher this is or how its created please let me know so I can add this to my hackingcitrix.txt. Thanks -wire

P.S: I tried to just use the launch ica but it tries to log in to the metaframe host itself and not the domain so the login attempt fails and the ***** is erased. This is why i'm in need of knowing how to get the password from this hash.

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<Pre>Do you know the base address of the Global Offset Table (GOT) on a Solaris 8 box? CORE IMPACT does.</Pre>
<A href="http://www.securityfocus.com/core"> http://www.securityfocus.com/core</A> Received on Tue Feb 25 13:29:21 2003