VDB-110155 · CVE-2017-6679 · BID 101567

Cisco Umbrella Virtual Appliance up to 2.0.3 SSH 7pk security

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco Umbrella Virtual Appliance up to 2.0.3 and classified as critical. Affected by this issue is some unknown functionality of the component SSH. This manipulation causes 7pk security. This vulnerability is registered as CVE-2017-6679. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Cisco Umbrella Virtual Appliance up to 2.0.3 and classified as critical. Affected by this vulnerability is an unknown part of the component SSH. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 09/21/2017. The weakness was published 12/01/2017 by David Coomber (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2017-6679 since 03/09/2017. Attacking locally is a requirement. A single authentication is necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 71 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 101567†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.4
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
09/21/2017 +196 days 🔍
10/24/2017 +33 days 🔍
12/01/2017 +38 days 🔍
12/01/2017 +0 days 🔍
12/02/2017 +1 days 🔍
12/11/2019 +739 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securityfocus.com⛔
Researcher: David Coomber
Status: Not defined

CVE: CVE-2017-6679 (🔍)
GCVE (CVE): GCVE-0-2017-6679
GCVE (VulDB): GCVE-100-110155
SecurityFocus: 101567 - Cisco Umbrella Virtual Appliance CVE-2017-6679 Unauthorized Access Vulnerability

Entryinfo

Created: 12/02/2017 10:01
Updated: 12/11/2019 20:42
Changes: 12/02/2017 10:01 (59), 12/11/2019 20:42 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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