The Juniper EX switch must be configured to authenticate Network Time Protocol sources using authentication that is cryptographically based.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-253926 | JUEX-NM-000490 | SV-253926r843811_rule | Low |
| Description |
|---|
| If Network Time Protocol is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate and affect scheduled actions. NTP authentication is used to prevent this tampering by authenticating the time source. |
| STIG | Date |
|---|---|
| Juniper EX Series Switches Network Device Management Security Technical Implementation Guide | 2022-08-31 |
Details
| Check Text ( C-57378r843809_chk ) |
|---|
| Review the network device configuration to determine if the network device authenticates NTP endpoints before establishing a local, remote, or network connection using authentication that is cryptographically based. [edit system ntp] authentication-key 1 type sha256 value "PSK"; ## SECRET-DATA authentication-key 2 type sha1 value "PSK"; ## SECRET-DATA server key 1 prefer; ## SECRET-DATA server key 2; ## SECRET-DATA trusted-key [ 1 2 ]; If the network device does not authenticate Network Time Protocol sources using authentication that is cryptographically based, this is a finding. |
| Fix Text (F-57329r843810_fix) |
|---|
| Configure the network device to authenticate Network Time Protocol sources using authentication that is cryptographically based. set system ntp authentication-key 1 type sha256 set system ntp authentication-key 1 value "PSK" set system ntp authentication-key 2 type sha1 set system ntp authentication-key 2 value "PSK" set system ntp server key 1 set system ntp server prefer set system ntp server key 2 set system ntp trusted-key 1 set system ntp trusted-key 2 |