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AIX must prohibit password reuse for a minimum of five generations.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-215224 | AIX7-00-001127 | SV-215224r508663_rule | Medium |
| Description |
|---|
| Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements. |
| STIG | Date |
|---|---|
| IBM AIX 7.x Security Technical Implementation Guide | 2023-02-13 |
Details
| Check Text ( C-16422r294123_chk ) |
|---|
| From the command prompt, run the following command to check the system default "histsize" attribute value: # lssec -f /etc/security/user -s default -a histsize default histsize=5 If the default "histsize" value is not set, or its value is less than "5", this is a finding. From the command prompt, run the following command to check "histsize" attribute value for all accounts: # lsuser -a histsize ALL root histsize=5 user1 histsize=5 user2 histsize=5 user3 histsize=6 If any user does not have "histsize" set, or its "histsize" value is less than "5", this is a finding. |
| Fix Text (F-16420r294124_fix) |
|---|
| From the command prompt, run the following command to set "histsize=5" for the default stanza in "/etc/security/user": # chsec -f /etc/security/user -s default -a histsize=5 For each user who has "histsize" value less than "5", set its "histsize" to "5" by running the following command from command prompt: # chsec -f /etc/security/user -s [user_name] -a histsize=5 |