GLSA 200411-17: mtink: Insecure tempfile handling
Posted on: 11/09/2004 05:56 PM

A mtink security update is available for Gentoo Linux

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200411-17
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: mtink: Insecure tempfile handling
Date: November 09, 2004
Bugs: #70310
ID: 200411-17

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======

mtink is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the utility.

Background
=========

mtink is a status monitor and inkjet cartridge changer for some Epson printers.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-print/mtink < 1.0.5 >= 1.0.5

Description
==========

Tavis Ormandy from Gentoo Linux discovered that mtink uses insecure permissions on temporary files.

Impact
=====

A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When mtink is executed, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All mtink users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-print/mtink-1.0.5"

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

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

http://security.gentoo.org/glsa/glsa-200411-17.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 http://bugs.gentoo.org.

License
======

Copyright 2004 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


Printed from Linux Compatible (http://www.linuxcompatible.org/news/story/glsa_200411_17_mtink_insecure_tempfile_handling.html)