full-disclosure - [ GLSA 200411-21 ] Samba: Remote Denial of Service

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From: vorlon at gentoo.org (Matthias Geerdsen)
Subject: [ GLSA 200411-21 ] Samba: Remote Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200411-21
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Samba: Remote Denial of Service
      Date: November 11, 2004
      Bugs: #70429
        ID: 200411-21

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Synopsis
========

An input validation flaw in Samba may allow a remote attacker to cause
a Denial of Service by excessive consumption of CPU cycles.

Background
==========

Samba is a freely available SMB/CIFS implementation which allows
seamless interoperability of file and print services to other SMB/CIFS
clients.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-fs/samba       < 3.0.8                               >= 3.0.8
                                                                 < 3.0

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

An input validation flaw exists in ms_fnmatch.c when matching filenames
that contain wildcards.

Impact
======

A remote attacker may be able to cause an abnormal consumption of CPU
resources, resulting in slower performance of the server or even a
Denial of Service.

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-3.0.8"

References
==========

  [ 1 ] Samba Security Announcement
        http://www.samba.org/samba/security/CAN-2004-0930.html
  [ 2 ] CAN-2004-0930
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0930

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

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

  http://security.gentoo.org/glsa/glsa-200411-21.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 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.
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