Gentoo: ncpfs Buffer overflow in ncplogin and ncpmap
Posted by Joe Shakespeare   
Gentoo ncpfs is vulnerable to a buffer overflow that could lead to local execution of arbitrary code with elevated privileges.

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Gentoo Linux Security Advisory                           GLSA 200412-09
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                                            http://security.gentoo.org/
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  Severity: High
     Title: ncpfs: Buffer overflow in ncplogin and ncpmap
      Date: December 15, 2004
      Bugs: #72820
        ID: 200412-09

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Synopsis
========

ncpfs is vulnerable to a buffer overflow that could lead to local
execution of arbitrary code with elevated privileges.

Background
==========

ncpfs is a NCP protocol network filesystem that allows access to
Netware services, for example to mount volumes of NetWare servers or
print to NetWare print queues.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-fs/ncpfs       < 2.2.5                               >= 2.2.5

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

Karol Wiesek discovered a buffer overflow in the handling of the '-T'
option in the ncplogin and ncpmap utilities, which are both installed
as SUID root by default.

Impact
======

A local attacker could trigger the buffer overflow by calling one of
these utilities with a carefully crafted command line, potentially
resulting in execution of arbitrary code with root privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ncpfs users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/ncpfs-2.2.5"

References
==========

  [ 1 ] Full Disclosure Advisory

http://lists.netsys.com/pipermail/full-disclosure/2004-November/029563.html
  [ 2 ] CAN-2004-1079
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1079

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

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

  http://security.gentoo.org/glsa/glsa-200412-09.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/2.0