lynis

lynis:globals.version

The version of Lynis desired to be installed. (default 3.1.1)

lynis:globals.archive_hash

The hash of the archive that Lynis is to be installed from (used for integrity checking). (default d72f4ee7325816bb8dbfcf31eb104207b9fe58a2493c2a875373746a71284cc3)

lynis:globals.hash_type

The type of hash to verify the downloaded archive with.

lynis:globals.tar_url

The http/https url from which to download the archive. Note that the filename should follow the default pattern (lynis-$(version).tar.gz).

Note: Configuring these variables via Augments requires the use of the variables key (introduced in CFEngine 3.18.0). These variables are also configurable via module input.

  {
    "variables": {
      "lynis:globals.version": {
        "value": "3.0.8",
        "comment": "The version of Lynis desired."
      },
      "lynis:globals.archive_hash": {
        "value": "98373a4cc9d0471ab9bebb249e442fcf94b6bf6d4e9c6fc0b22bca1506646c63",
        "comment": "The hash (sha256) listed for the tarball hosted on the Lynis website (https://cisofy.com/downloads/lynis/)."
      }
    }
  }

When the class lynis:want_report_generated_now is defined Lynis will be run and lynis-report.dat will be updated.

[root@hub lynis]# cf-agent -KI --define lynis:want_report_generated_now
    info: Executing 'no timeout' ... '/opt/lynis/lynis-3.0.7/lynis audit system --quiet --auditor 'CFEngine cf-agent''
  notice: Q: "....0.7/lynis audi": /opt/lynis/lynis-3.0.7/include/tests_mac_frameworks: line 161: permissive: command not found
Q: "....0.7/lynis audi": /opt/lynis/lynis-3.0.7/include/tests_mac_frameworks: line 162: permissive: command not found
    info: Last 2 quoted lines were generated by promiser '/opt/lynis/lynis-3.0.7/lynis audit system --quiet --auditor 'CFEngine cf-agent''
    info: Completed execution of '/opt/lynis/lynis-3.0.7/lynis audit system --quiet --auditor 'CFEngine cf-agent''

If used from the command line, you can add the --info option to see all the results from Lynis:

R: ----- Warnings -----
R: NETW-2704 -- Nameserver 192.168.1.1 does not respond
R: PKGS-7392 -- Found one or more vulnerable packages.
R: NETW-2705 -- Couldn't find 2 responsive nameservers
R: ----- Suggestions -----
R: NETW-2704 -- Check connection to this nameserver and make sure no outbound DNS queries are blocked (port 53 UDP and TCP).
R: KRNL-6000 -- One or more sysctl values differ from the scan profile and could be tweaked
R: HRDN-7222 -- Harden compilers like restricting access to root user only
R: PKGS-7392 -- Update your system with apt-get update, apt-get upgrade, apt-get dist-upgrade and/or unattended-upgrades
R: ACCT-9626 -- Enable sysstat to collect accounting (no results)
R: MACF-6208 -- Check output of aa-status
R: AUTH-9328 -- Default umask in /etc/login.defs could be more strict like 027
R: BOOT-5122 -- Set a password on GRUB bootloader to prevent altering boot configuration (e.g. boot in single user mode without password)
R: LOGG-2190 -- Check what deleted files are still in use and why.
R: SSH-7408 -- Consider hardening SSH configuration
R: NETW-2705 -- Check your resolv.conf file and fill in a backup nameserver if possible
R: STRG-1846 -- Disable drivers like firewire storage when not used, to prevent unauthorized storage or data theft
R: AUTH-9262 -- Install a PAM module for password strength testing like pam_cracklib or pam_passwdqc
R: PROC-3614 -- Check process listing for processes waiting for IO requests
R: FILE-6310 -- To decrease the impact of a full /var file system, place /var on a separate partition
R: PKGS-7420 -- Consider using a tool to automatically apply upgrades
R: FINT-4350 -- Install a file integrity tool to monitor changes to critical and sensitive files
R: STRG-1840 -- Disable drivers like USB storage when not used, to prevent unauthorized storage or data theft
R: NETW-3032 -- Consider running ARP monitoring software (arpwatch,arpon)
R: BANN-7126 -- Add a legal banner to /etc/issue, to warn unauthorized users
R: TIME-3128 -- Check ntpq peers output for time source candidates
R: TIME-3124 -- Check ntpq peers output for selected time source
R: AUTH-9286 -- Configure maximum password age in /etc/login.defs
R: PKGS-7370 -- Install debsums utility for the verification of packages with known good database.
R: PKGS-7346 -- Purge old/removed packages (5 found) with aptitude purge or dpkg --purge command. This will cleanup old configuration files, cron jobs and startup scripts.
R: BANN-7130 -- Add legal banner to /etc/issue.net, to warn unauthorized users
R: ACCT-9630 -- Audit daemon is enabled with an empty ruleset. Disable the daemon or define rules
R: LYNIS -- This release is more than 4 months old. Consider upgrading
R: ACCT-9622 -- Enable process accounting
R: HRDN-7230 -- Harden the system by installing at least one malware scanner, to perform periodic file system scans
R: ----- Details -----
R: KRNL-6000 kernel.core_uses_pid -- kernel.core_uses_pid value is '0' prefer '1'
R: SSH-7408 LogLevel -- LogLevel value is 'INFO' prefer 'VERBOSE'
R: SSH-7408 TCPKeepAlive -- TCPKeepAlive value is 'YES' prefer 'NO'
R: KRNL-6000 kernel.sysrq -- kernel.sysrq value is '438' prefer '0'
R: SSH-7408 X11Forwarding -- X11Forwarding value is 'YES' prefer 'NO'
R: KRNL-6000 net.ipv4.conf.default.accept_source_route -- net.ipv4.conf.default.accept_source_route value is '1' prefer '0'
R: SSH-7408 AllowTcpForwarding -- AllowTcpForwarding value is 'YES' prefer 'NO'
R: KRNL-6000 net.ipv6.conf.all.accept_redirects -- net.ipv6.conf.all.accept_redirects value is '1' prefer '0'
R: KRNL-6000 net.ipv4.conf.default.accept_redirects -- net.ipv4.conf.default.accept_redirects value is '1' prefer '0'
R: KRNL-6000 net.ipv4.conf.all.rp_filter -- net.ipv4.conf.all.rp_filter value is '0' prefer '1'
R: KRNL-6000 net.ipv6.conf.default.accept_redirects -- net.ipv6.conf.default.accept_redirects value is '1' prefer '0'
R: KRNL-6000 kernel.kptr_restrict -- kernel.kptr_restrict value is '0' prefer '2'
R: SSH-7408 MaxSessions -- MaxSessions value is '10' prefer '2'
R: SSH-7408 Port -- Port value is '22' prefer ''
R: SSH-7408 ClientAliveCountMax -- ClientAliveCountMax value is '3' prefer '2'
R: KRNL-6000 net.ipv4.conf.all.accept_redirects -- net.ipv4.conf.all.accept_redirects value is '1' prefer '0'
R: KRNL-6000 net.ipv4.conf.all.log_martians -- net.ipv4.conf.all.log_martians value is '0' prefer '1'
R: KRNL-6000 kernel.yama.ptrace_scope -- kernel.yama.ptrace_scope value is '0' prefer '1 2 3'
R: SSH-7408 AllowAgentForwarding -- AllowAgentForwarding value is 'YES' prefer 'NO'
R: KRNL-6000 net.ipv4.conf.all.send_redirects -- net.ipv4.conf.all.send_redirects value is '1' prefer '0'
R: SSH-7408 Compression -- Compression value is 'YES' prefer 'NO'
R: KRNL-6000 net.ipv4.conf.default.log_martians -- net.ipv4.conf.default.log_martians value is '0' prefer '1'