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Sicherheit: Umgehung der Zugriffskontrollen in hylafax
Aktuelle Meldungen Distributionen
Name: Umgehung der Zugriffskontrollen in hylafax
ID: 200501-21
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Di, 11. Januar 2005, 12:00
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1182
http://marc.theaimsgroup.com/?l=hylafax&m=110545119911558&w=2
Applikationen: HylaFAX

Originalnachricht

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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
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
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@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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