CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS
Percentile
21.7%
Emerson has identified an open SSH port vulnerability in the DeltaV Wireless I/O Card. Emerson has produced a firmware patch that disables the SSH port.
This vulnerability could be exploited remotely.
Emerson reports that the vulnerability affects the following products:
Note: The DeltaV system is not susceptible to this vulnerability except for the products and versions listed above.
An attacker may be able to use this open port to access the file system of devices using the affected product.
Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
Emerson is a US-based company that maintains offices in several countries around the world, including the US, UK, Netherlands, Italy, India, Germany, France, Czech Republic, China, and Australia.
The affected products, DeltaV Wireless I/O Cards, are used to connect workstations and servers in the DeltaV network. According to Emerson, DeltaV Wireless I/O Cards are deployed across several sectors including Chemical and Energy. Emerson estimates that these products are used worldwide.
DeltaV Wireless I/O Cards (WIOC) running the firmware available in the DeltaV system, release v13.3, have the SSH (Secure Shell) functionality enabled unnecessarily.
CVE-2016-9347NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9347, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. has been assigned to this vulnerability. A CVSS v3 base score of 5.0 has been assigned; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L, web site last accessed November 29, 2016.
This vulnerability could be exploited remotely.
No known public exploits specifically target this vulnerability.
Crafting a working exploit for this vulnerability would be difficult.
Emerson released the solution for this vulnerability in their Guardian Support Knowledge Base Article NK-1500-0152 dated September 30, 2016 (hotfix bundle โDeltaV_133_WIOC_02_CSSโ). The provided fix disables the SSH port that is always available in the WIOC running v13.3 original firmware.
In order to limit exposure to these and other vulnerabilities, Emerson recommends that users deploy and configure DeltaV systems and related components as described in the following documents:
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available in the ICSโCERT Technical Information Paper, ICS-TIP-12-146-01BโTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
www2.emersonprocess.com/siteadmincenter/PM%20Central%20Web%20Documents/Emerson%20Wireless%20Security.pdf
www2.emersonprocess.com/siteadmincenter/PM%20DeltaV%20Documents/Manuals/CS_DeltaV_Security_Manual-TOC%20only.pdf
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CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS
Percentile
21.7%