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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=hylafax&m=110545119911558&w=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@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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