Details
If the application allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at guessing and brute-force attacks.
The number of changed characters refers to the number of changes required with respect to the total number of positions in the current password. In other words, characters may be the same within the two passwords; however, the positions of the like characters must be different.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
Configure the BIG-IP appliance to use a properly configured authentication server to require when a password is changed, the characters are changed in at least eight (8) of the positions within the password.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Identification and Authentication.This control applies to the following type of system F5.
References
- 800-53|IA-5(1)(b)
- CAT|II
- CCI|CCI-000195
- Rule-ID|SV-217403r557520_rule
- STIG-ID|F5BI-DM-000119
- STIG-Legacy|SV-74585
- STIG-Legacy|V-60155
- Vuln-ID|V-217403