GLSA-200606-07 : Vixie Cron: Privilege Escalation
High Nessus Plugin ID 21680
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200606-07 (Vixie Cron: Privilege Escalation)
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.
SolutionAll Vixie Cron users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=sys-process/vixie-cron-4.1-r9'