[ GLSA 200411-27 ] Fcron: Multiple vulnerabilities

[lewk () gentoo org]

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Gentoo Linux Security Advisory                           GLSA 200411-27
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Fcron: Multiple vulnerabilities
      Date: November 18, 2004
      Bugs: #71311
        ID: 200411-27

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Synopsis
========

Multiple vulnerabilities in Fcron can allow a local user to potentially
cause a Denial of Service.

Background
==========

Fcron is a command scheduler with extended capabilities over cron and
anacron.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  sys-apps/fcron      <= 2.9.5                            *>= 2.0.2
                                                            >= 2.9.5.1

Description
===========

Due to design errors in the fcronsighup program, Fcron may allow a
local user to bypass access restrictions (CAN-2004-1031), view the
contents of root owned files (CAN-2004-1030), remove arbitrary files or
create empty files (CAN-2004-1032), and send a SIGHUP to any process. A
vulnerability also exists in fcrontab which may allow local users to
view the contents of fcron.allow and fcron.deny (CAN-2004-1033).

Impact
======

A local attacker could exploit these vulnerabilities to perform a
Denial of Service on the system running Fcron.

Workaround
==========

Make sure the fcronsighup and fcrontab binaries are only executable by
trusted users.

Resolution
==========

All Fcron users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=sys-apps/fcron-2.0.2&quot;

References
==========

  [ 1 ] CAN-2004-1030
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1030
  [ 2 ] CAN-2004-1031
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1031
  [ 3 ] CAN-2004-1032
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1032
  [ 4 ] CAN-2004-1033
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1033

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

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

  http://security.gentoo.org/glsa/glsa-200411-27.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

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