The Ubuntu operating system must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts have been made.
An XCCDF Rule
Description
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005
- ID
- SV-238235r958736_rule
- Version
- UBTU-20-010072
- Severity
- Low
- References
- Updated
Remediation Templates
A Manual Procedure
Configure the Ubuntu operating system to utilize the "pam_faillock" module.
Edit the /etc/pam.d/common-auth file.
Add the following lines below the "auth" definition for pam_unix.so:
auth [default=die] pam_faillock.so authfail