CVE-2017-6679
6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:H/Au:S/C:C/I:C/A:C
6.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
26.9%
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.
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| cisco:umbrella | cisco umbrella | le | 2.0.3 |
CNA Affected
[
{
"vendor": "n/a",
"product": "Cisco Umbrella Virtual Appliance Version 2.0.3 and prior",
"versions": [
{
"version": "Cisco Umbrella Virtual Appliance Version 2.0.3 and prior",
"status": "affected"
}
]
}
]References
www.securityfocus.com/bid/101567
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-tunnel-gJw5thgE
support.umbrella.com/hc/en-us/articles/115004154423
support.umbrella.com/hc/en-us/articles/115004752143-Virtual-Appliance-Vulnerability-due-to-always-on-SSH-Tunnel-RESOLVED-2017-09-15
www.info-sec.ca/advisories/Cisco-Umbrella.html
Related
6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:H/Au:S/C:C/I:C/A:C
6.4 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
26.9%