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TUCoPS :: Linux :: Gentoo :: hack0499.htm

Samba: Remote printing non-vulnerability



ERRATA: [ GLSA 200409-14 ] Samba: Remote printing non-vulnerability

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Gentoo Linux Security Advisory [ERRATA UPDATE]        GLSA 200409-14:02
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                                            http://security.gentoo.org/ 
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  Severity: Low
     Title: Samba: Remote printing non-vulnerability
      Date: September 10, 2004
      Bugs: #62476
        ID: 200409-14:02

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Errata
======

This advisory incorrectly described Samba versions as being vulnerable
to a remote denial of service. After further verifications, it appears
that a remote user can only deny service to himself, so this bug does
not induce any security issue at all. The corrected sections appear
below.

Synopsis
========

Samba has a bug with out of sequence print change notification
requests, but it cannot be used to perform a remote denial of service
attack.

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

There are no affected packages.

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

Due to a bug in the printer_notify_info() function, authorized users
could potentially crash their smbd process by sending improperly
handled print change notification requests in an invalid order. Windows
XP SP2 clients can trigger this behavior by sending a
FindNextPrintChangeNotify() request before previously sending a
FindFirstPrintChangeNotify() request.

Impact
======

We incorrectly thought that this bug could be exploited to deny service
to all Samba users. It is not the case, this bug has no security impact
whatsoever. Many thanks to Jerry Carter from the Samba team for
correcting our mistake.

Workaround
==========

There is no need for a workaround.

Resolution
==========

Samba users can keep their current versions.

References
==========

  [ 1 ] Samba Release Notes
        http://samba.org/samba/history/samba-3.0.6.html 
  [ 2 ] Samba Bug #1520
        https://bugzilla.samba.org/show_bug.cgi?id=1520

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

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

  http://security.gentoo.org/glsa/glsa-200409-14.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 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.

http://creativecommons.org/licenses/by-sa/1.0 
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