The Juniper SRX Services Gateway must implement replay-resistant authentication mechanisms for network access to privileged accounts.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-223216 | SRG-APP-000156-NDM-000250 | JUSX-DM-000124 | SV-223216r960993_rule | 2024-12-20 | 3 |
Description
A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authenticator and the application validating the user credentials must not be vulnerable to a replay attack.
An authentication process resists replay attacks if it is impractical to achieve a successful authentication by recording and replaying a previous authentication message.
There are 2 approved methods for accessing the Juniper SRX which are, in order of preference, the SSH protocol and the console port.
ℹ️ Check
Verify SSH is configured to use a replay-resistant authentication mechanism.
[edit]
show system services ssh
If SSH is not configured to use the MAC authentication protocol, this is a finding.
✔️ Fix
Configure SSH to use a replay-resistant authentication mechanism. The following is an example stanza.
[edit]
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