Fcron: Multiple vulnerabilities Multiple vulnerabilities in Fcron can allow a local user to potentially cause a Denial of Service. fcron November 18, 2004 November 18, 2004: 01 71311 local 2.0.2 2.9.5.1 2.9.5

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" CAN-2004-1030 CAN-2004-1031 CAN-2004-1032 CAN-2004-1033 lewk lewk lewk