Joined: 12 May 2004
|Posted: Fri Jun 09, 2006 4:26 pm Post subject: [ GLSA 200606-07 ] Vixie Cron: Privilege Escalation
|Gentoo Linux Security Advisory
Title: Vixie Cron: Privilege Escalation (GLSA 200606-07)
Date: June 09, 2006
Vixie Cron allows local users to execute programs as root.
Vixie Cron is a command scheduler with extended syntax over cron.
Vulnerable: < 4.1-r9
Unaffected: >= 4.1-r9
Architectures: All supported architectures
Roman Veretelnikov discovered that Vixie Cron fails to properly check whether it can drop privileges accordingly if setuid() in do_command.c fails due to a user exceeding assigned resource limits.
Local users can execute code with root privileges by deliberately exceeding their assigned resource limits and then starting a command through Vixie Cron. This requires resource limits to be in place on the machine.
There is no known workaround at this time.
All Vixie Cron users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-process/vixie-cron-4.1-r9"
Last edited by GLSA on Sun Jul 30, 2006 4:18 am; edited 2 times in total