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ConfigProof

All controls

ASA-SEC-026HighCisco ASA

Remote access with local users only

At a glance

Base severity

High

Area

Remote access VPN

Platform

Cisco ASA

Evidence level

Fact0.90

Benchmark reference

Reads the export, not the device

ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.

Why it matters

Local accounts carry no multi-factor authentication and are the target of the password spraying campaigns run against ASA VPNs.

How to fix it

Web interface

The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.

  1. In ASDM: Configuration > Remote Access VPN > Network (Client) Access > Secure Client Connection Profiles, edit the profile and set Authentication to an AAA server group with MFA (RADIUS or SAML), or certificates. Apply and save.
  2. On the CLI: tunnel-group <profile> general-attributes, authentication-server-group <group>, and write memory.

Command line

Cisco ASA CLI

configure terminaltunnel-group <tunnel-group> general-attributesauthentication-server-group <server-group>endwrite memory

An example. Values in angle brackets are yours to supply; a finding on your own export fills in the names it read. Typed in configuration mode; write memory saves it, with no separate commit. Read every line first.

Read it back

show running-config tunnel-group <tunnel-group>
Values to fill in2
<tunnel-group>
The connection profile (tunnel group)
<server-group>
The TACACS+ or RADIUS server group
Before you type it2
  • Written from the ASA 9.x command reference and not run on a device: read each line before you paste it.
  • In multiple context mode, type it in the context it applies to (changeto context <name>).

How to confirm the fix

  • Test a login through the new server group before removing local users.

Limits

  • No limitation is recorded for this control beyond the one that applies to all of them: it reads a configuration export.

Compliance references

No benchmark recommendation is mapped to this control in this version.

More in Remote access VPN

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