[37406] in bugtraq
[ GLSA 200411-27 ] Fcron: Multiple vulnerabilities
daemon@ATHENA.MIT.EDU (Luke Macken)
Thu Nov 18 19:55:27 2004
Date: Thu, 18 Nov 2004 16:44:22 -0500
From: Luke Macken <lewk@gentoo.org>
To: gentoo-announce@gentoo.org
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
Message-id: <1100814262.7614.21.camel@tomservo.rh.rit.edu>
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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
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Multiple vulnerabilities in Fcron can allow a local user to potentially
cause a Denial of Service.
Background
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Fcron is a command scheduler with extended capabilities over cron and
anacron.
Affected packages
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-------------------------------------------------------------------
Package / Vulnerable / Unaffected
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1 sys-apps/fcron <=3D 2.9.5 *>=3D 2.0.2
>=3D 2.9.5.1
Description
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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
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A local attacker could exploit these vulnerabilities to perform a
Denial of Service on the system running Fcron.
Workaround
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Make sure the fcronsighup and fcrontab binaries are only executable by
trusted users.
Resolution
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All Fcron users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=3Dsys-apps/fcron-2.0.2&qu=
ot;
References
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[ 1 ] CAN-2004-1030
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-1030
[ 2 ] CAN-2004-1031
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-1031
[ 3 ] CAN-2004-1032
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-1032
[ 4 ] CAN-2004-1033
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-1033
Availability
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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?
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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
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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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