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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 |
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Title: Fcron: Multiple vulnerabilities |
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Date: November 18, 2004 |
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Bugs: #71311 |
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ID: 200411-27 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in Fcron can allow a local user to potentially |
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cause a Denial of Service. |
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Background |
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========== |
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|
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Fcron is a command scheduler with extended capabilities over cron and |
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anacron. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 sys-apps/fcron <= 2.9.5 *>= 2.0.2 |
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>= 2.9.5.1 |
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|
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Description |
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=========== |
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|
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Due to design errors in the fcronsighup program, Fcron may allow a |
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local user to bypass access restrictions (CAN-2004-1031), view the |
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contents of root owned files (CAN-2004-1030), remove arbitrary files or |
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create empty files (CAN-2004-1032), and send a SIGHUP to any process. A |
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vulnerability also exists in fcrontab which may allow local users to |
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view the contents of fcron.allow and fcron.deny (CAN-2004-1033). |
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|
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Impact |
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====== |
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|
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A local attacker could exploit these vulnerabilities to perform a |
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Denial of Service on the system running Fcron. |
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Workaround |
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========== |
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Make sure the fcronsighup and fcrontab binaries are only executable by |
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trusted users. |
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Resolution |
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========== |
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All Fcron users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-apps/fcron-2.0.2" |
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References |
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========== |
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[ 1 ] CAN-2004-1030 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1030 |
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[ 2 ] CAN-2004-1031 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1031 |
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[ 3 ] CAN-2004-1032 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1032 |
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[ 4 ] CAN-2004-1033 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1033 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200411-27.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2004 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.0 |
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