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Category:   Application (File Transfer/Sharing)  >   Samba CIFS Vendors:   Samba.org
(Conectiva Issues Fix) Samba QFILEPATHINFO Buffer Overflow Lets Remote Authenticated Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012333
SecurityTracker URL:  http://securitytracker.com/id/1012333
CVE Reference:   CAN-2004-0882   (Links to External Site)
Date:  Nov 26 2004
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.0 - 3.0.7
Description:   A vulnerability was reported in Samba in the processing of QFILEPATHINFO requests. A remote authenticated user can execute arbitrary code on the target system.

Stefan Esser of e-matters GmbH reported that a remote authenticated user can send a specially crafted TRANSACT2_QFILEPATHINFO request for a specially crafted filename containing unicode characters to trigger a buffer overflow. When the filename's unicode characters are converted by the target server in constructing the reply, the space allocated by the server may be overflowed.

If the filename does not already exist on the target server, the remote authenticated user must have write access to create the specially crafted filename before issuing the request.

The vendor was notified on September 24, 2004.

Default installations are affected.

The original advisory is available at:

http://security.e-matters.de/advisories/132004.html
Impact:   A remote authenticated user can execute arbitrary code on the target system.
Solution:   Conectiva has released a fix.

ftp://atualizacoes.conectiva.com.br/10/SRPMS/samba-3.0.7-62749U10_6cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient-devel-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient-devel-static-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient0-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-clients-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-common-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-doc-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-server-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-swat-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-testprogs-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vfs-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-clamav-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-fprot-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-fsecure-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-kaspersky-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-mks-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-oav-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-sophos-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-trend-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-winbind-3.0.7-62749U10_6cl.i386.rpm
Vendor URL:  www.samba.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Conectiva)

Message History:   This archive entry is a follow-up to the message listed below.
Nov 15 2004 Samba QFILEPATHINFO Buffer Overflow Lets Remote Authenticated Users Execute Arbitrary Code


 Source Message Contents
Date:  Thu, 25 Nov 2004 13:04:42 -0200
Subject:  [Conectiva-updates] [CLA-2004:899] Conectiva Security Announcement


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT 
- --------------------------------------------------------------------------

PACKAGE   : samba
SUMMARY   : Fix for Samba's denial of service vulnerability
DATE      : 2004-11-25 13:03:00
ID        : CLA-2004:899
RELEVANT
RELEASES  : 10

- -------------------------------------------------------------------------

DESCRIPTION
 Samba[1] provides SMB/CIFS services (such as file and printer
 sharing) used by clients compatible with Microsoft Windows(TM).
 
 Karol Wiesek found a vulnerability[2] in the input validation
 routines in Samba 3.x used to match filename strings containing
 wildcard characters that may allow a remote attacker to consume
 abnormal amounts of CPU cycles.
 
 Also, Steffan Esser found a buffer overflow in the QFILEPATHINFO
 request handler in Samba 3.0.x through 3.0.7 that may allow remote
 attackers to execute arbitrary code via a TRANSACT2_QFILEPATHINFO
 request with a small "maximum data bytes" value.


SOLUTION
 It is recommended that all Samba users upgrade their packages. This
 update will automatically restart the service if it is already
 running.
 
 
 REFERENCES
 1.http://www.samba.org/
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0930
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0882


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/10/SRPMS/samba-3.0.7-62749U10_6cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient-devel-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient-devel-static-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libsmbclient0-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-clients-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-common-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-doc-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-server-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-swat-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-testprogs-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vfs-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-clamav-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-fprot-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-fsecure-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-kaspersky-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-mks-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-oav-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-sophos-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-vscan-trend-3.0.7-62749U10_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/samba-winbind-3.0.7-62749U10_6cl.i386.rpm


ADDITIONAL INSTRUCTIONS
 The apt tool can be used to perform RPM packages upgrades:

 - run:                 apt-get update
 - after that, execute: apt-get upgrade

 Detailed instructions regarding the use of apt and upgrade examples 
 can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at 
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en

- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

- -------------------------------------------------------------------------
Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com

- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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cGURxyBP9zJAFhQmX6az0tU=
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______________________________________________________________________
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
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