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Gentoo Linux Security Advisory                           GLSA 200411-27
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                                            https://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 ">=sys-apps/fcron-2.0.2"

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:

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

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
https://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.

https://creativecommons.org/licenses/by-sa/2.0/