[ GLSA 200805-23 ] Samba: Heap-based buffer overflow

[Tobias Heinlein <keytoaster () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200805-23
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Samba: Heap-based buffer overflow
      Date: May 29, 2008
      Bugs: #222299
        ID: 200805-23

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Synopsis
========

A heap-based buffer overflow vulnerability was found in Samba, allowing
for the execution of arbitrary code.

Background
==========

Samba is a suite of SMB and CIFS client/server programs.

Affected packages
=================

    -------------------------------------------------------------------
     Package       /   Vulnerable   /                       Unaffected
    -------------------------------------------------------------------
  1  net-fs/samba     < 3.0.28a-r1                       >= 3.0.28a-r1

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

Alin Rad Pop (Secunia Research) reported a vulnerability in Samba
within the receive_smb_raw() function in the file lib/util_sock.c when
parsing SMB packets, possibly leading to a heap-based buffer overflow
via an overly large SMB packet.

Impact
======

A remote attacker could possibly exploit this vulnerability by enticing
a user to connect to a malicious server or by sending specially crafted
packets to an nmbd server configured as a local or domain master
browser, resulting in the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Samba users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.28a-r1"

References
==========

  [ 1 ] CVE-2008-1105
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1105

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200805-23.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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