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

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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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