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The system must prohibit the reuse of passwords within five iterations.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-4084 | GEN000800 | SV-38679r1_rule | IAIA-1 IAIA-2 | Medium |
| Description |
|---|
| If a user, or root, used the same password continuously or was allowed to change it back shortly after being forced to change it to something else, it would provide a potential intruder with the opportunity to keep guessing at one user's password until it was guessed correctly. |
| STIG | Date |
|---|---|
| AIX 5.3 Security Technical Implementation Guide | 2012-05-25 |
Details
| Check Text ( C-36911r1_chk ) |
|---|
| Procedure: #lsuser -a histsize ALL If the returned histsize for any user is less than 5, this is a finding. |
| Fix Text (F-32090r1_fix) |
|---|
| Use the chsec command to configure the system to prohibit the reuse of passwords within five iterations. # chsec -f /etc/security/user -s default -a histsize=5 # chuser histsize=5 < user id > |