For nonlocal maintenance sessions using SSH, the Juniper SRX Services Gateway must securely configure SSHv2 Message Authentication Code (MAC) algorithms to protect the integrity of maintenance and diagnostic communications.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223225	JUSX-DM-000147	SV-223225r513364_rule		Medium

Description
To protect the integrity of nonlocal maintenance sessions, SSHv2 with MAC algorithms for integrity checking must be configured. Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the Internet) or an internal network. The SSHv2 protocol suite includes Layer 7 protocols such as SCP and SFTP which can be used for secure file transfers.

Description

To protect the integrity of nonlocal maintenance sessions, SSHv2 with MAC algorithms for integrity checking must be configured. Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the Internet) or an internal network. The SSHv2 protocol suite includes Layer 7 protocols such as SCP and SFTP which can be used for secure file transfers.

STIG	Date
Juniper SRX SG NDM Security Technical Implementation Guide	2021-03-25

Details

Check Text ( C-24898r513362_chk )
Verify SSHv2 and MAC algorithms for integrity checking. [edit] show system services ssh If SSHv2 and integrity options are not configured in compliance with DoD requirements, this is a finding.

Fix Text (F-24886r513363_fix)
Configure SSH integrity options to comply with DoD requirements. [edit] set system services ssh protocol-version v2 set system services ssh macs hmac-sha2-512 set system services ssh macs hmac-sha2-256 set system services ssh macs hmac-sha1 set system services ssh macs hmac-sha1-96