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Gentoo Linux Security Advisory                           GLSA 200512-14
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                                            http://security.gentoo.org/
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  Severity: High
     Title: NBD Tools: Buffer overflow in NBD server
      Date: December 23, 2005
      Bugs: #116314
        ID: 200512-14

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Synopsis
========

The NBD server is vulnerable to a buffer overflow that may result in
the execution of arbitrary code.

Background
==========

The NBD Tools are the Network Block Device utilities allowing one to
use remote block devices over a TCP/IP network. It includes a userland
NBD server.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  sys-block/nbd     < 2.8.2-r1                          >= 2.8.2-r1

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

Kurt Fitzner discovered that the NBD server allocates a request buffer
that fails to take into account the size of the reply header.

Impact
======

A remote attacker could send a malicious request that can result in the
execution of arbitrary code with the rights of the NBD server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All NBD Tools users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-block/nbd-2.8.2-r1"

References
==========

  [ 1 ] CVE-2005-3534
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3534

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

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

  http://security.gentoo.org/glsa/glsa-200512-14.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 2005 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/2.0


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