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             AUSCERT External Security Bulletin Redistribution

                 ESB-2004.0730 -- Samba Security Advisory
                      Possible Buffer Overrun in smbd
                             16 November 2004

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

Product:           Samba 3.0.x
Publisher:         Samba
Operating System:  Linux variants
                   UNIX variants
Impact:            Execute Arbitrary Code/Commands
Access:            Remote/Unauthenticated
CVE Names:         CAN-2004-0882

Ref:               http://security.e-matters.de/advisories/132004.html

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Subject:	Possible Buffer Overrun in smbd
CVE #: 		CAN-2004-0882
Affected
Versions:	Samba 3.0.x <= 3.0.7

Summary: 	A possible buffer overrun in smbd could
		lead to code execution by a remote user


Patch Availability
- - - ------------------

A patch for Samba 3.0.7 (samba-3.0.7-CAN-2004-0882.patch) is
available from http://www.samba.org/samba/ftp/patches/security/.
The patch has been signed with the "Samba Distribution Verification
Key"  (ID F17F9772).


Description
- - - -----------

Invalid bounds checking in reply to certain trans2 requests
could result in a buffer overrun in smbd.  In order to exploit
this defect, the attacker must be able to create files with very
specific Unicode filenames on the Samba share.


Protecting Unpatched Servers
- - - ----------------------------

The Samba Team always encourages users to run the latest stable
release as a defense of against attacks.  However, under certain
circumstances it may not be possible to immediately upgrade
important installations.  In such cases, administrators should
read the "Server Security" documentation found at
http://www.samba.org/samba/docs/server_security.html.


Credits
- - - --------

This security issue was reported to Samba developers by Stefan
Esser from e-matters Security (http://security.e-matters.de/).



- - - -- 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

Internet Email: auscert@auscert.org.au
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