CVE-2017-6679

medium Cisco
CVSS v3 Base Score
6.4
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.1%
Exploitation probability in 30 days
Top 71% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: December 1, 2017 (3085 days ago)
Last Modified: May 13, 2026
Vendor: Cisco
Source: NVD

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.

CWE

NVD-CWE-noinfo

Affected Products

cisco umbrella

References

🔗 www.securityfocus.com 🔗 sec.cloudapps.cisco.com 🔗 support.umbrella.com 🔗 support.umbrella.com 🔗 www.info-sec.ca