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Gentoo Linux Security Advisory                           GLSA 200501-24
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                                            https://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
================
    -------------------------------------------------------------------
     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
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

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

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 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.

https://creativecommons.org/licenses/by-sa/2.0/