Vulnerability CVE-2017-6679


Published: 2017-12-01

Description:
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.

Type:

CWE-254

(Security Features)

Vendor: Cisco
Product: Umbrella 
Version: 2.0.3;

CVSS2 => (AV:L/AC:H/Au:S/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6/10
10/10
1.5/10
Exploit range
Attack complexity
Authentication
Local
High
Single time
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete

 References:
http://www.securityfocus.com/bid/101567
https://support.umbrella.com/hc/en-us/articles/115004154423
https://support.umbrella.com/hc/en-us/articles/115004752143-Virtual-Appliance-Vulnerability-due-to-always-on-SSH-Tunnel-RESOLVED-2017-09-15
https://www.info-sec.ca/advisories/Cisco-Umbrella.html

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