Multiple vulnerabilities in Fcron can allow a local user to potentially cause a Denial of Service.
|Package||sys-process/fcron on all architectures|
|Affected versions||<= 2.9.5|
|Unaffected versions||revision >= 2.0.2, >= 18.104.22.168|
Fcron is a command scheduler with extended capabilities over cron and anacron.
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).
A local attacker could exploit these vulnerabilities to perform a Denial of Service on the system running Fcron.
Make sure the fcronsighup and fcrontab binaries are only executable by trusted users.
All Fcron users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-process/fcron-2.0.2"
November 18, 2004
November 18, 2004: 01