Test document
Lynis
Nexus URL TBD
The initial results compare with the Lynis Incubation: PASS/FAIL Criteria, v1.0 as follows.
IoT Gateway
PC/Server for robot control
The Lynis Program Update test MUST pass with no errors.
2022-03-23 05:13:56 Test: Checking for program update... 2022-03-23 05:14:03 Current installed version : 308 2022-03-23 05:14:03 Latest stable version : 307 2022-03-23 05:14:03 No Lynis update available
Fix: Download and run the latest Lynis directly on SUT.
Steps To Implement Security Scan Requirements#InstallandExecute
The following list of tests MUST complete as passing
| No. | Test | Result | Fix |
|---|---|---|---|
| 1 | Test: Checking PASS_MAX_DAYS option in /etc/login.defs | Result: password aging limits are not configured | Set PASS_MAX_DAYS 180 in /etc/login.defs |
| 2 | Performing test ID AUTH-9328 (Default umask values) | Result: found /etc/profile.d, with one or more files in it | OK |
| 3 | Performing test ID SSH-7440 (Check OpenSSH option: AllowUsers and AllowGroups) | Result: AllowUsers is not set Result: AllowGroups is not set Result: SSH has no specific user or group limitation. Most likely all valid users can SSH to this machine. Hardening: assigned partial number of hardening points (0 of 1). Currently having 102 points (out of 155) Security check: file is normal Checking permissions of /home/pi/lynis/lynis/include/tests_snmp File permissions are OK | Configure AllowUsers, AllowGroups in /etc/ssh/sshd_config |
| 4 | Test: checking for file /etc/network/if-up.d/ntpdate | Result: file /etc/network/if-up.d/ntpdate does not exist Result: Found a time syncing daemon/client. Hardening: assigned maximum number of hardening points for this item (3). Currently having 111 points (out of 170) | OK |
| 5 | Performing test ID KRNL-6000 (Check sysctl key pairs in scan profile) : Following sub-tests required | N/A | N/A |
| 5a | sysctl key fs.suid_dumpable contains equal expected and current value (0) | Result: sysctl key fs.suid_dumpable contains equal expected and current value (0) | OK |
| 5b | sysctl key kernel.dmesg_restrict contains equal expected and current value (1) | Result: sysctl key kernel.dmesg_restrict has a different value than expected in scan profile. Expected=1, Real=0 | Set recommended value in /etc/sysctl.d/90-lynis-hardening.conf echo 'kernel.dmesg_restrict=1' | sudo tee -a /etc/sysctl.d/90-lynis-hardening.conf sudo /sbin/sysctl --system sudo sysctl -a |grep dmesg |
| 5c | sysctl key net.ipv4.conf.default.accept_source_route contains equal expected and current value (0) | Result: sysctl key net.ipv4.conf.default.accept_source_route has a different value than expected in scan profile. Expected=0, Real=1 | Set recommended value in /etc/sysctl.d/90-lynis-hardening.conf echo 'net.ipv4.conf.default.accept_source_route=0' | sudo tee -a /etc/sysctl.d/90-lynis-hardening.conf sudo /sbin/sysctl --system sudo sysctl -a |grep ipv4.conf.default.accept_source_route |
| 6 | Test: Check if one or more compilers can be found on the system | Result: found installed compiler. See top of logfile which compilers have been found or use /usr/bin/grep to filter on 'compiler' Hardening: assigned partial number of hardening points (1 of 3). Currently having 128 points (out of 217) | Uninstall gcc and remove /usr/bin/as (installed with binutils) |