[ GLSA 200407-17 ] l2tpd: Buffer overflow

[Kurt Lieber <klieber () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200407-17
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                                            http://security.gentoo.org/
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  Severity: High
     Title: l2tpd: Buffer overflow
      Date: July 22, 2004
      Bugs: #53009
        ID: 200407-17

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Synopsis
========

A buffer overflow in l2tpd could lead to remote code execution. It is
not known whether this bug is exploitable.

Background
==========

l2tpd is a GPL implentation of the Layer 2 Tunneling Protocol.

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

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
  1  net-dialup/l2tpd       < 0.69-r2                       >= 0.69-r2

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

Thomas Walpuski discovered a buffer overflow that may be exploitable by
sending a specially crafted packet. In order to exploit the vulnerable
code, an attacker would need to fake the establishment of an L2TP
tunnel.

Impact
======

A remote attacker may be able to execute arbitrary code with the
privileges of the user running l2tpd.

Workaround
==========

There is no known workaround for this vulnerability.

Resolution
==========

All users are recommended to upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=net-l2tpd-0.69-r2"
    # emerge ">=net-l2tpd-0.69-r2"

References
==========

  [ 1 ] CAN-2004-0649
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0649
  [ 2 ] Full Disclosure Report
        http://seclists.org/lists/fulldisclosure/2004/Jun/0094.html

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

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

    http://security.gentoo.org/glsa/glsa-200407-17.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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