[ GLSA 200909-17 ] ZNC: Directory traversal

[Tobias Heinlein <keytoaster () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200909-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: ZNC: Directory traversal
      Date: September 13, 2009
      Bugs: #278684
        ID: 200909-17

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Synopsis
========

A directory traversal was found in ZNC, allowing for overwriting of
arbitrary files.

Background
==========

ZNC is an advanced IRC bouncer.

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

    -------------------------------------------------------------------
     Package      /  Vulnerable  /                          Unaffected
    -------------------------------------------------------------------
  1  net-irc/znc       < 0.074                                >= 0.074

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

The vendor reported a directory traversal vulnerability when processing
DCC SEND requests.

Impact
======

A remote, authenticated user could send a specially crafted DCC SEND
request to overwrite arbitrary files with the privileges of the user
running ZNC, and possibly cause the execution of arbitrary code e.g. by
uploading a malicious ZNC module.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ZNC users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose =net-irc/znc-0.074

References
==========

  [ 1 ] CVE-2009-2658
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2658

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

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

  http://security.gentoo.org/glsa/glsa-200909-17.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
https://bugs.gentoo.org.

License
=======

Copyright 2009 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/2.5

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