Check: RHEL-09-411080
RHEL 9 STIG:
RHEL-09-411080
(in versions v1 r3 through v1 r1)
Title
RHEL 9 must automatically lock the root account until the root account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period. (Cat II impact)
Discussion
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, also known as brute-forcing, is reduced. Limits are imposed by locking the account. Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005
Check Content
Verify RHEL 9 is configured to lock the root account after three unsuccessful logon attempts with the command: $ grep even_deny_root /etc/security/faillock.conf even_deny_root If the "even_deny_root" option is not set, is missing or commented out, this is a finding.
Fix Text
Configure RHEL 9 to lock out the "root" account after a number of incorrect login attempts using "pam_faillock.so", first enable the feature using the following command: $ sudo authselect enable-feature with-faillock Then edit the "/etc/security/faillock.conf" file as follows: add or uncomment the following line: even_deny_root
Additional Identifiers
Rule ID: SV-258055r926152_rule
Vulnerability ID: V-258055
Group Title: SRG-OS-000329-GPOS-00128
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000044 |
The information system enforces the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period. |
| CCI-002238 |
The information system automatically locks the account or node for either an organization-defined time period, until the locked account or node is released by an administrator, or delays the next logon prompt according to the organization-defined delay algorithm when the maximum number of unsuccessful logon attempts is exceeded. |
Controls
| Number | Title |
|---|---|
| AC-7 |
Unsuccessful Logon Attempts |