GLSA 200501-21: HylaFAX: hfaxd unauthorized login vulnerabi
Posted on: 01/11/2005 03:34 PM

A HylaFAX security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200501-21
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http://security.gentoo.org/
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Severity: Normal
Title: HylaFAX: hfaxd unauthorized login vulnerability
Date: January 11, 2005
Bugs: #75941
ID: 200501-21

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Synopsis
=======

HylaFAX is subject to a vulnerability in its username matching code, potentially allowing remote users to bypass access control lists.

Background
=========

HylaFAX is a software package for sending and receiving facsimile messages.

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

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Package / Vulnerable / Unaffected
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1 net-misc/hylafax < 4.2.0-r2 >= 4.2.0-r2

Description
==========

The code used by hfaxd to match a given username and hostname with an entry in the hosts.hfaxd file is insufficiently protected against malicious entries.

Impact
=====

If the HylaFAX installation uses a weak hosts.hfaxd file, a remote attacker could authenticate using a malicious username or hostname and bypass the intended access restrictions.

Workaround
=========

As a workaround, administrators may consider adding passwords to all entries in the hosts.hfaxd file.

Resolution
=========

All HylaFAX users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/hylafax-4.2.0-r2"

Note: Due to heightened security, weak entries in the hosts.hfaxd file may no longer work. Please see the HylaFAX documentation for details of accepted syntax in the hosts.hfaxd file.

References
=========

[ 1 ] CAN-2004-1182
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1182
[ 2 ] HylaFAX Announcement
http://marc.theaimsgroup.com/?l=hylafaxm=110545119911558w=2

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

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

http://security.gentoo.org/glsa/glsa-200501-21.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


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