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

The system must require administrator action to unlock an account locked by excessive failed login attempts.

DISA Rule

SV-219582r603263_rule

Vulnerability Number

V-219582

Group Title

SRG-OS-000329

Rule Version

OL6-00-000356

Severity

CAT II

CCI(s)

• 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.

Weight

10

Fix Recommendation

To configure the system to lock out accounts after a number of incorrect logon attempts and require an administrator to unlock the account 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

If the "unlock_time" parameter is set to a value other than "0", "never", or less than "900" on "auth" lines with the "pam_faillock.so" module, or is missing from these lines, this is a finding.

Note: The maximum configurable value for "unlock_time" is "604800".

Vulnerability Number

V-219582

Documentable

False

Rule Version

OL6-00-000356

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

If the "unlock_time" parameter is set to a value other than "0", "never", or less than "900" on "auth" lines with the "pam_faillock.so" module, or is missing from these lines, this is a finding.

Note: The maximum configurable value for "unlock_time" is "604800".

Check Content Reference

M

Target Key

2928

Comments