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             AUSCERT External Security Bulletin Redistribution

                       ESB-2006.0451 -- [UNIX/Linux]
                    Memory exhaustion DoS against smbd
                               17 July 2006

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              samba 3.0.1 to 3.0.22 (inclusive)
Publisher:            Samba
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-3403

Ref:                  ESB-2006.0249

Revision History:     July 17 2006: Corrected CVE number
                      July 11 2006: Initial Release

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==========================================================
==
== Subject:     Memory exhaustion DoS against smbd
== CVE ID#:     CAN-2006-1059
==
== Versions:    Samba Samba 3.0.1 - 3.0.22 (inclusive)
==
== Summary:     smbd may allow internal structures
==              maintaining state for share connections
==              to grow unbounded.
==
==========================================================


===========
Description
===========

The smbd daemon maintains internal data structures used track
active connections to file and printer shares.  In certain
circumstances an attacker may be able to continually increase
the memory usage of an smbd process by issuing a large number
of share connection requests.  This defect affects all Samba
configurations.



==================
Patch Availability
==================

A patch for Samba 3.0.1 - 3.0.22 has been posted at
http://www.samba.org/samba/security/.

Guidelines for securing Samba hosts are listed at
http://www.samba.org/docs/server_security.html


=======
Credits
=======

This security issue discovered during an internal security
audit of the Samba source code by the Samba Team.


==========================================================
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
==========================================================
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

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