GLSA 200411-27: Fcron: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Fcron: Multiple vulnerabilities
Date:	11/18/2004
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
sys-process/fcron	<= 2.9.5	>= 2.0.2	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:

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

References

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 https://bugs.gentoo.org.