[UNIX] Samba FindNextPrintChangeNotify Error Allows Remote Authenticated Users To Crash smbd

From: SecuriTeam (support_at_securiteam.com)
Date: 09/06/04

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    Date: 6 Sep 2004 14:05:55 +0200
    
    

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      Samba FindNextPrintChangeNotify Error Allows Remote Authenticated Users To
    Crash smbd
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.samba.org/samba> Samba is an Open Source/Free Software suite
    that provides seamless file and print services to SMB/CIFS clients.

    A Samba client can crash a remote Samba daemon (smbd) under certain
    conditions by the use of FindNextPrintChangeNotify.

    DETAILS

    Vulnerable Systems:
     * Samba versions prior to 3.0.6 and 2.2.11

    Immune Systems:
     * Samba version 3.0.6 and 2.2.11

    The vendor reported that a remote authenticated user can send a
    FindNextPrintChangeNotify() request without having previously sent a
    corresponding FindFirstPrintChangeNotify() requeste to cause smbd to
    crash. The behaviour can be triggered easily by a Windows XP SP2 client
    which apparently does this in certain situations.

    The flaw is located in the printer_notify_info() in
    'rpc_server/srv_spoolss_nt.c' .

    Vendor Status:
    The vulnerability was reported to the vendor by Craig Huegen. The vendor
    has already issued a new upgrade version which is available from
    <http://samba.org/samba/download/> http://samba.org/samba/download/.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:jerome.athias@caramail.com>
    "JXrXme" ATHIAS.

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