The Juniper EX switch must be configured to prohibit the use of cached authenticators after an organization-defined time period.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-253927 | JUEX-NM-000500 | SV-253927r961521_rule | CCI-002007 | medium |
| Description | ||||
| Some authentication implementations can be configured to use cached authenticators. If cached authentication information is out-of-date, the validity of the authentication information may be questionable. The organization-defined time period should be established for each device depending on the nature of the device; for example, a device with just a few administrators in a facility with spotty network connectivity may merit a longer caching time period than a device with many administrators. | ||||
| STIG | Date | |||
| Juniper EX Series Switches Network Device Management Security Technical Implementation Guide | 2025-03-07 | |||
Details
Check Text (C-253927r961521_chk)
Review the network device configuration to determine if the network device or its associated authentication server prohibits the use of cached authenticators after an organization-defined time period.
Verify idle-timeouts, SSH keepalive messages, and SSH rekey are configured to meet the requirements of the target network.
[edit system]
login {
idle-timeout 10;
}
system {
services {
ssh {
protocol-version v2;
client-alive-count-max (0..255);
client-alive-interval (0..65535 seconds);
rekey {
data-limit (51200..4294967295 bytes);
time-limit (1..1440 minutes);
}
}
}
}
For externally authenticated accounts, verify the external authentication server enforces appropriate authenticator timeouts.
If cached authenticators are used after an organization-defined time period, this is a finding.
Fix Text (F-57330r843813_fix)
Configure the network device or its associated authentication server to prohibit the use of cached authenticators after an organization-defined time period.
set system login idle-timeout 10
set system services ssh protocol-version v2
set system services ssh client-alive-count-max (0..255)
set system services ssh client-alive-interval (0..65535 seconds)
set system services ssh rekey data-limit (51200..4294967295 bytes)
set system services ssh rekey time-limit (1..1440 minutes)