A new security update has been released for Gentoo Linux - ZNC: Directory traversal. Here the announcement:

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