CVE-2017-6679
6.4 · MEDIUMOverview
CVE-2017-6679 is a medium-severity vulnerability affecting cisco umbrella_virtual_appliance. It was published on December 1, 2017 and has a CVSS 3.1 base score of 6.4 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from cisco. Update umbrella_virtual_appliance to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | umbrella_virtual_appliance | >= 0, < 2.1.0 | Affected |
References
Frequently Asked Questions
What is CVE-2017-6679?
CVE-2017-6679 is a medium-severity vulnerability affecting cisco umbrella_virtual_appliance. It was published on December 1, 2017 and has a CVSS 3.1 base score of 6.4 (MEDIUM).
How severe is CVE-2017-6679?
This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2017-6679?
Check the references section for vendor advisories and patches from cisco. Update umbrella_virtual_appliance to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2017-6679?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-6679 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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