A tnftp security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200501-24
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http://security.gentoo.org/
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Severity: Normal
Title: tnftp: Arbitrary file overwriting
Date: January 14, 2005
Bugs: #74704
ID: 200501-24

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Synopsis
=======

tnftp fails to validate filenames when downloading files, making it vulnerable to arbitrary file overwriting.



Background
=========

tnftp is a NetBSD FTP client with several advanced features.

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

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Package / Vulnerable / Unaffected
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1 net-ftp/tnftp < 20050103 >= 20050103

Description
==========

The 'mget' function in cmds.c lacks validation of the filenames that are supplied by the server.

Impact
=====

An attacker running an FTP server could supply clients with malicious filenames, potentially allowing the overwriting of arbitrary files with the permission of the connected user.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All tnftp users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-ftp/tnftp-20050103"

References
=========

[ 1 ] CAN-2004-1294
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1294
[ 2 ] Original Advisory
http://tigger.uic.edu/~jlongs2/holes/tnftp.txt

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

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

http://security.gentoo.org/glsa/glsa-200501-24.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