cyberstrikeus CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 4.2.18
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The PermitEmptyPasswords parameter specifies if the SSH server allows login to accounts with empty password strings.
Rationale
Disallowing remote shell access to accounts that have an empty password reduces the probability of unauthorized access to the system.
Audit Procedure
Command Line
Run the following command and verify the output:
sshd -T | grep -i permitemptypasswords
Expected Result
permitemptypasswords no
Remediation
Command Line
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
PermitEmptyPasswords no
Default Value
PermitEmptyPasswords no
References
- NIST SP 800-53 Rev. 5: CM-7
CIS Controls
v8 - 4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software.
v7 - 9.2 Ensure Only Approved Ports, Protocols, and Services Are Running.
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Assessment Status
Automated