Avoid FPs resulting from ubuntu weekly cron jobs #192
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Feedback from a falco user: -- to more findings from last night: logrotate cronjob (Debian default): Shell spawned by untrusted binary (user=root shell=sh parent=logrotate cmdline=sh -c invoke-rc.d rsyslog rotate > /dev/null logrotate_script /var/log/syslog) passwd cronjob (Debian default): Sensitive file opened for reading by non-trusted program (user=root name=cmp command=cmp -s shadow.bak /etc/shadow file=/etc/shadow) -- New macro cmp_cp_by_passwd allows cmp/cp to be run by passwd to examine sensitive files. Add logrotate as a program that can spawn a shell. Also do some cleanups, moving items to lists and splitting long single-line conditions into multiple lines.
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Feedback from a falco user:
--
to more findings from last night:
logrotate cronjob (Debian default):
Shell spawned by untrusted binary (user=root shell=sh parent=logrotate cmdline=sh -c invoke-rc.d rsyslog rotate > /dev/null logrotate_script /var/log/syslog)
passwd cronjob (Debian default):
Sensitive file opened for reading by non-trusted program (user=root name=cmp command=cmp -s shadow.bak /etc/shadow file=/etc/shadow)
New macro cmp_cp_by_passwd allows cmp/cp to be run by passwd to examine
sensitive files. Add logrotate as a program that can spawn a shell.
Also do some cleanups, moving items to lists and splitting long
single-line conditions into multiple lines.