STIGQter: STIG Summary: Oracle Linux 6 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The system must disable accounts after three consecutive unsuccessful logon attempts.

DISA Rule

SV-208836r603263_rule

Vulnerability Number

V-208836

Group Title

SRG-OS-000021

Rule Version

OL6-00-000061

Severity

CAT II

CCI(s)

• CCI-000044 - The information system enforces the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period.

Weight

10

Fix Recommendation

To configure the system to lock out accounts after a number of incorrect logon attempts using "pam_faillock.so", modify the content of both "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" as follows:

Add the following line immediately before the "pam_unix.so" statement in the "AUTH" section:

auth required pam_faillock.so preauth silent deny=3 unlock_time=900 fail_interval=900

Add the following line immediately after the "pam_unix.so" statement in the "AUTH" section:

auth [default=die] pam_faillock.so authfail deny=3 unlock_time=900 fail_interval=900

Add the following line immediately before the "pam_unix.so" statement in the "ACCOUNT" section:

account required pam_faillock.so

Note that any updates made to "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" may be overwritten by the "authconfig" program. The "authconfig" program should not be used.

Check Contents

To ensure the failed password attempt policy is configured correctly, run the following command:

# grep pam_faillock /etc/pam.d/system-auth /etc/pam.d/password-auth

The output should show "deny=3" for both files.
If that is not the case, this is a finding.

Vulnerability Number

V-208836

Documentable

False

Rule Version

OL6-00-000061

Severity Override Guidance

To ensure the failed password attempt policy is configured correctly, run the following command:

# grep pam_faillock /etc/pam.d/system-auth /etc/pam.d/password-auth

The output should show "deny=3" for both files.
If that is not the case, this is a finding.

Check Content Reference

M

Target Key

2928

Comments