[ GLSA 200501-21 ] HylaFAX: hfaxd unauthorized login vulnerability

From: Thierry Carrez (koon_at_gentoo.org)
Date: 01/11/05

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    Date: Tue, 11 Jan 2005 17:34:44 +0100
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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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