AOS must implement replay-resistant authentication mechanisms for network access to privileged accounts.

An XCCDF Rule

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. Techniques to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., Transport Layer Security [TLS], Web Services Security [WS_Security]). Additional techniques include time-synchronous or challenge-response one-time authenticators.

ID: SV-266930r1039811_rule
Version: ARBA-ND-000250
Severity: Medium
References: CCI-001941
Updated: about 2 months ago

Remediation Templates

Configure AOS using the web interface:  
 
1. Navigate to Configuration >> System >> Admin and expand "Admin Authentication Servers".  
2. Click on the plus sign (+) under "All Servers" and configure the type of authentication server. Provide the Name, Type, and IP address. Click "Submit".  
3. Select the created authentication server and configure the required attributes for LDAP: 
  Admin-dn <username> 
Admin-passwd <password> 
Re-type admin-passwd <password> 
Auth port: 636 
Base-dn: cn/ou=<container>,dc=<level>,dc=<mil> 
Key-attribute: userPrincipalName 
 
4. Click "Submit".  
5. Repeat this process and configure a second authentication server.  
6. Click Pending Changes >> Deploy Changes.  
7. Click on the plus sign (+) under "Server Groups" and add a server group. Click "Submit".  
8. Select the created server group and click the plus sign (+) in the Server Group <server group name> box.  
9. Add the first configured authentication server.  
10. Reselect the created server group and click the plus sign (+) in the Server Group <server group name> box.  
11. Click Submit >> Pending Changes >> Deploy Changes. 
12. Expand "Admin Authentication Options". Select the Server group created earlier.  
13. Click Submit >> Pending Changes >> Deploy Changes.

AOS must implement replay-resistant authentication mechanisms for network access to privileged accounts.

Description

Remediation Templates

A Manual Procedure