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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
-------------------------------------------------------------------
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@xxxxxxxxxx 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
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