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

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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_at_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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