1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200411-27 / fcron |
| Release Date | November 18, 2004 |
| Latest Revision | November 18, 2004: 01 |
| Impact | normal |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| sys-process/fcron | <= 2.9.5 | revision >= 2.0.2, >= 2.9.5.1 | All supported architectures |
Related bugreports: #71311
Multiple vulnerabilities in Fcron can allow a local user to potentially cause a Denial of Service.
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:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-process/fcron-2.0.2" |