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[ GLSA 200411-27 ] Fcron: Multiple vulnerabilities
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GLSA
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Joined: 13 Jun 2003
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PostPosted: Thu Nov 18, 2004 10:11 pm    Post subject: [ GLSA 200411-27 ] Fcron: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: Fcron: Multiple vulnerabilities (GLSA 200411-27)
Severity: normal
Exploitable: local
Date: November 18, 2004
Bug(s): #71311
ID: 200411-27

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: sys-process/fcron
Vulnerable: <= 2.9.5
Unaffected: >= 2.0.2 < 2.0.3
Unaffected: >= 2.9.5.1
Architectures: All supported architectures


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:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-process/fcron-2.0.2"


References

CAN-2004-1030
CAN-2004-1031
CAN-2004-1032
CAN-2004-1033


Last edited by GLSA on Sat Aug 23, 2008 4:17 am; edited 3 times in total
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