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CVE-2017-6679

Status Candidate

Overview

The Cisco Umbrella Virtual Appliance Version 2.0.3 and prior contained an undocumented encrypted remote support tunnel (SSH) which auto initiated from the customer's appliance to Cisco's SSH Hubs in the Umbrella datacenters. These tunnels were primarily leveraged for remote support and allowed for authorized/authenticated personnel from the Cisco Umbrella team to access the appliance remotely and obtain full control without explicit customer approval. To address this vulnerability, the Umbrella Virtual Appliance version 2.1.0 now requires explicit customer approval before an SSH tunnel from the VA to the Cisco terminating server can be established.

Related Files

Cisco Umbrella Virtual Appliance 2.0.3 Undocumented Support Tunnel
Posted Oct 24, 2017
Authored by David Coomber

Cisco Umbrella Virtual Appliance versions 2.0.3 and below contain an undocumented, auto-initiated reverse SSH tunnel which allows the Cisco Umbrella support team to have persistent and unrestricted access to the virtual appliance.

tags | advisory
systems | cisco
advisories | CVE-2017-6679
SHA-256 | 5e84ae818066bb4ac19ab58bf8766980a52ebe49a4dd880c31b67e49f4cb6e1b
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